I don't know that I would use any of those. I would probably reword this way:
We commissioned (all of) these mosaics, icons and miniatures. These pieces were (all) commissioned.
A side advantage of this approach is that the reader won't confuse a commissioned piece (an object you ordered) with a piece being sold on commission (with the seller getting a percentage of the sales price).
"made for a commission" is certainly possible. If a particular work or body of artistic work was described as made "on commission," I don't think anyone would confuse it with "on commission" in "sold on commission."