Ok so here is a great answer for you:
Jimmy Fu cases are incorrect for PreV, they have long shaped Lugs, which are corect for A-F series, not PreV, EL and the 111j Case are the best out there, but I have to say, 111J is better because the bezel height is incorrect on the EL case (it is a little thicker) and you don't need to play with it. However, the 111J case needs to be reshaped a little, here is mine with a little reshaping:
Also the Crown I am using is a T48, however, PreV pam crowns are a little thicker, so a Palp crown would be your best bet!
So your list would have to look like this
CASE: 111J reshaped, EL, Old Helenarou,(Eliminate the others here please!)
DIAL: FGD, DSN
HANDS: FGD, DSN
CRYSTAL: BigCrown, Cartel 177, 219 or 005k crystal, DSN's is still foggy, and not OEM thickness!
CG: LH, V, TB/WSO, (Eliminate DSN CG please)
CROWN: PALP, T48
CASEBACK:Jakob, DSN
BUCKLES: Rolexfinder (he no longer makes PreV, but you can source them around)
STRAPS: Dirk, MP Pav90
There you go!