On stock wheels, you wanna find, I believe from '72 Blazer wheels. Go to any salvage yard and if you're lucky, you'll find some. Best way to tell from the front is they have 4 nubs for the caps instead of 3. The reason is, your stock 3 nubs have a certain degree offset where as the 4 nubs are more squared. I hope you're picturing this, but that's where lowered spindle disc brakes tend to rub on the caliper.
Yes, another option is Wheel Vintiques, but not sure if your stock caps work. Never tried myself.
On brands, I used McGaughy's kit. Great product so far.
Good luck
This pic is with Wheel Vintiques
This is with stock 4 nub wheels
Kind of hard but, notice the 4 nubs for caps
