Is there a flush mount Floyd Rose Tremolo system for a PRS Custom 24 guitar?

Question: are you looking just to replace the unit or does the guitar have a regular style vibrato tail piece?
Most of the PRS Custom 24's I see have either the standard vibrato or a Floyd Rose.
Armed with this kind of information we could help you do a better search for what you are trying to find.
I have seen a couple of Custom 24's that had a regular bridge and tail stop, but most of my searches show either the Floyd Rose or standard vibrato.
If he has the regular vibrato, then it doesn't have the locking nut, so a Floyd Rose might be OK if you use locking tuners, but just to install a Floyd Rose vibrato, you would need to modify the entire bridge assembly with the posts to accommodate a Floyd Rose bridge. If you were just replacing an worn-out one with a new one, then that would be real easy! Just need to know the model type and purchase one.
A little more information is needed.
Thanks, Woody

thanks for the response.....I should have been more clear I guess.....his guitar has a PRS standard tremolo system with locking tuners...It works great...he can pull up with it and dive bomb....just like a Rose....the only thing missing from this scenario if I'm not mistaken, is the fine tuning capability that the FR would have. The FR with the cut out does provide a bit more room and range...

So after discussing this with him, I was able to talk him out of it, as the body would need modification to allow for the installation of the FR.....something I certainly don't want to do.
I haven't started working on it yet, but I played if for a bit and the whammy bar works great even though the over all action needs work...He's a shredder and not infatuated with the stock pups...I agreed with him....he's gonna have a hard time shredding with them...

I'll check into your suggestions and pass them along to him....

I'm gonna have to just get some Nut Sauce.....I've been using pencil lead...for ever....it works but I keep hearing good things about the Nut sauce.....Thanks for the help!

Yeah, "talk him out of it" is the M.O. in our shop. Never worth the money, and the motivation for people to modify an existing instrument is usually "I like how it sounds but want this feature", which will lead to disappointment after they find out that it doesn't sound like it did before. Those jobs can be surprisingly tedious as you figure out center lines and hope finish chipping is minimal, too.

For nuts, I like teflon powder. Not as staining/ugly as graphite. I also go over the slot with sandpaper after filing, especially the front edge and back edge (you probably won't reangle the slot). If you have to raise slots, what you use to raise them can be an issue, too. I've been using the Nut Rescue Powder and been really happy with how it is for tuning. I only ever find it lacking with slotted pegheads, but even then it is still adequate (no one is using a trem with a slotted peghead, except maybe some ridiculous thing from the '60s). Also, I've mentioned it here before, but I'll throw it out again - sometimes replacing the trem springs will breathe new life into the instrument for tuning stability. With old, worn ones it can be a little fuzzy what the neutral place is between springs and strings, but with fresh springs they'll snap right back to the same place. I don't have the mechanical engineering chops to explain why, but we've had it work many times in our shop.