I doubt it. I can't believe that antique codpieces are purchased for actors when one is needed for a part. I doubt that people who are in Renaissance Fairs spring for an antique codpiece. Replicas are made of almost everything that is old. I can't imagine that someone doesn't make codpieces to sell to tourists and others.
For the heck of it I took a moment and Googled codpieces for sale and found this.
Codpieces are no longer the reserve of ultra-fashionable men as ultra-fashionable women are sporting ornamental codpieces with a black pant or colourful codpieces worn casually with jeans.
Several fashion houses launched their codpieces – this season’s must have – recently and so far four have been spotted on red carpets at premieres in Hollywood and London. Unfortunately the cost of these items is prohibitive for many – who among our readers could afford over £3.5million for a Damien Hirst, diamond encrusted number?
http://beyondjane.com/fashion/trends/make-your-own-codpiece/
I guess that answers your question.