Universal Cycles has a lot of wheels on their site. They also custom build wheels. While I've never bought wheels from them, I have bought other bike stuff from them.
When I do look for wheels I'll often go there just to see the possible combinations of components that might be offered at what price. Then I'll do a google search just to see if I can find a better price on the same or similar rim and hub combination. Usually it's close to the same as Universal, but I tend to be patient for months and other sites would have a inventory blowout sale. However one of those sites, BikeNashbar, was bought up and doesn't seem to have as many deals as they used to.
Here is a link to Universal Cycles 26" wheels. Scroll down and you'll see some wheels on Shimano hubs and various rims.
https://www.universalcycles.com/shop...?category=5479
8 speed cassette or freewheel? Disc brakes or rim? Hub spacing between dropouts?