Clyde,
Since you have access to all sorts of parts numbers, can you check and see if these Side Marker Lights will fit the Hbody. I saw them this morning on a show as being reproduced new for Camaro's. If they fit, would be a good source for us. They are listed in : Trimparts.com
Dick
TrimPart: A6730 --
'70 -'73 Camaro Front Side Marker Light Assembly This fits the 1970-73 Camaro. It has the correct thin profile on the face of the lens. PAIR $43.70