I know you likely won't believe this but other than the lug stud length anything which fits a 2002 Trans-Am, Firebird or Camaro will fit (or that same generation). Yes the F-Body was RWD and yes it was a very strange offset for RWD.
You will need these wheel studs or something in the same length:
PTC 97239 {#972391} Front; M12-1.50 Serrated Wheel Stud (Application was a Hummer as I recall)
You also need the lug nuts from the TA if you want the decorative plastic caps to work.
I'm not saying that you need to use the same wheels I did but knowing that the F-Body wheels fit should really help your search as I discovered this myself and as I know it's not general knowledge.
This is how I know (My other '79 E-Body):
View attachment 599795
Scott