Not exactly on the availability of kits but I can see that eventually you will need info on the a/c for detailing so....
Flying Scale Models Nov/Dec 2001 has a walk around photo spread (8 pages including three view drawings cockpit dias and colour pics) of a P13B and C.
If you can't obtain a copy I can photo copy and fax/post to you. If you would prefer you can have the mag> I don't need it and my wife would be so pleased!!
Dai