名媛直播

One Youtube channel that I know makes great pots. You'll probably already have seen him if you've searched how to make bonsai pots, but he does really good work on the feet of his pots.

What charming little feet! Thanks for the share, 名媛直播Learner.

bskirkland - Will DM you soon. The forum is making me wait another day before I can send any messages directly!

If you're making your own pots, what about using marbles as feet? They come in plenty of colors and sizes. Will withstand temperature changes and water. You could create a socket on the bottom of each pot that would take a marble to be glued into it.
Or... using bolts with nuts on the ends, to give it a more industrial look. Again... use the bolts as the male part for the created socket on the bottom of the pot. Then use the nut as a foot print. If they rust, it will give it an interesting look. They're also nuts and bolts that are weather resistant.