Want new wheels but where to buy?

[los-lowrider]

I am thinking about a new wheel set up and searched a lot of pages but I didn't find the right ones. So where did you buy your rims especially if you want 20-8 for the front and 20-10 or 22-10 for the rear.
All rims i have seen are only the same width all around.

I would prefer black wheels because I think this looks very aggressiv and should save a lot of cleaning time.

So do you have any suggestions which shop has a wide range of products and goob prices. BTW what backspace shoul I take?

Attached is a photoshop picture a boardmember did for me.