Hello Tim and thank you for stopping by. The set of twin-ignition wire guide-brackets pictured above I purchased from a source in Germany at least 2+ years ago and they are reproductions of the factory originals. I will try and find the information but I can not guarantee that I can. In the meantime, you can buy these other reproductions, look herehttp://cgi.ebay.com/ebaymotors/PORSCHE-906-911R-RSR-935-934-WIRE-HOLDERS_W0QQitemZ4613155924QQcategoryZ107063QQssPageNameZWDVWQQrdZ1QQcmdZViewItem which are very inexpensive and of good quality as well. Love to see photos of your RSR project. If possible, email them directly to me at ajserrano@msn.com