^^^^ My BBS caps are in my BBS VZ's (identical design as the BBS Pescaras) but different width and offest.
BBS don't make caps in 65mm, trust me I've looked for my Pescaras. They make 3 standard sizes for their standard range of wheels but obviously didn't need to make caps for the limited edition Pescaras as standard VW caps were being used which are 65mm.
Can't you just fit any 55mm centre caps? Sure I've seen genuine BBS centre caps in 55mm fitments?
All caps are measured via the outside diameter so they are 65mm, inner width diameter is 55mm.