[ERA174]

You may have looked into this already. However, did you contact the wheel manufacturer (not BDR), to inquire if they have any old inventory or could reproduce a wheel that would match your wheels? I'm assuming BDR is not the manufacturer of the wheels, that they out source them. Maybe another wheel manufacturer could reproduce a wheel to match your wheels?
On another note, I'm currently doing upgrades to my ERA Cobra and hope to have it back on the road later this year. Upon completion I'll be looking to get out and do some driving, if your interested I'll keep you in the loop.
Good luck in your search.
John