I recently had an order from Ambient Weather LLC where circular walnut plaques were required.
I have been making a variety of products for Ambient. This is just the latest and I really like working with their boss to create new products for their company. You can find much of their stuff on Amazon as well as their home site.
I just provide the wood, predrilled, for them to mount their products on. Precision is paramount because there is no second chance for redrilling these tiny screw holes.
I even managed to get the back routed with a keyhole bit so that it hangs flush on the wall.
Here is the final result.