Blazer (Rally? Wheels?)

[Mark70Z]

Please help!!

I see a lot of the Blazers with what looks like factory type rally wheels ("sorta" like the ones that came factory on the Corvette and Camaro). They appear to be steel (with a large amount of holes around the wheel), with a beauty ring and center cap. Did these type wheels come factory on a 67-72 Blazer? Also, what is the size of these wheels??

I also see a lot of aftermarket wheels, so how hard are these steel wheels to come by? Any of you guys have any for sale??