I pour and tye mine. It's not a difficult hobby and it's fun catching fish on something you made....
Lots of talented tyers participate in the jig tying forum that could "hook" you up.

If I had to buy micro jigs I would get them from JungleJimJigs. I know he has custom Matzuo #12 jig hooks and VMC #12 jig hooks - you can find micro jigs with smaller hooks but then it really gets expensive.