My understanding is that the blackhawk SERPA holsters only support railed M9s on their duty holsters.
You'll want the holsters for the M9/M9A1 since the PTP has rails. Neither the Beretta 92 nor 96 are railed, and neither will fit the KWA M9 PTP.
This is the level 2 duty holster:
http://www.blackhawk.com/product/Lev...,1172,1412.htm