Captured three versions in my wooljersey photos. The earliest Wolf conversions used Cyclo parts for the cage. Latter versions with the chrome plates with holes were done in the early-mid 1970's... I purchased a NR Pat.75 (pictured) from a guy at Veloswap SF a few years back who said he used to do the conversions for Cupertino - don't know whether he assembled or made the parts.
http://www.wooljersey.com/
John Siemsen
Portland, Oregon