To any measure, some serious smithing would have to be done to either the weapon or the can to attach a suppressor to the revolver. Then if the weapon is an off-beat caliber, you'd either have to use a can made for the closest, larger, caliber out there or find a manufacturer that is willing to do a 1 off... and that ain't easy..... or cheap...
For the shear S&G's of it, if you've got money to piss away, then heck.. it'd be neat. It would deminish the sound quite a bit, but you'd still have to wear ears as that gap goes. Even with the shifting cylinders of old, a LOT of gas would still escape...
KAC's unit was a prototype to see if it could be done. They dont make that for market, and they wont 1off anything. Hell they price themselves so hight that they do not do many civilian sales (except for the ID10T's that want to fork out 2x's the money for something that you can get for 1/2 that price and beat it in effectiveness, but hell they are the largest suppressor manufacturer out there).
Several years ago someone did make an effective suppressor design that worked on a revolver platform. It either used a Ruger or a S&W 66 (dont remember) as its platform, but it had a shroud that completely enclosed the cylinder. Even then it still didn't work as well as an auto.
BTW.. Florida isn't just NFA friendly.. THEY'RE MAGICAL! ITS THE BEST DAMN STATE TO LIVE IN!! BAR NONE.. They have THE MOST LAX firearms laws of ANY STATE in the union. Seriously... Its an Awesome state!