Is is possible to receive a cheep SubVendorID?

["F.Pitzl" <F.Pitzl@GMX.DE>]

Hello Experts,

This is a commercial question, but I hope you have some suggestions to
my problem. We are a small supplier of automatic test systems. For our
new product we want to use a PCI interface card between the PC and
our application. Now my problem is that I was told, the only way to 
receive a SubVendorID is to become, at least one year, a member of
the PCISIG. This means the minimal tax we have to pay are about
$2500 - not really acceptable for a product quantity of 50 cards per
year.
Do you have any suggestions to a cheaper way to receive the SubVendorID
?
Or do you mention to violate the specs and to use a unofficial
SubVendorID?

Regards,
Florian Pitzl