I finally remembered where I found provenance and I dug out a box of unopened bags of bulk marbles from Marble King that were stashed away in my collection. These are the same marbles, not exactly the same batch or colors, but the structure is the same. Near to a pelt, but not quite right. I think the main giveaway on these is that a good many of them are lopsided, with 3 ribbons on one side and one on the other, unlike pelts which normally have two on either side.
Some other things worth noting in these bags are the "fenton glass" marbles sold by fenton at the gift shop. I've heard they were made with fenton glass by Marble King, but looking at them in with the rest like these, I believe they are just marbles made by Marble King and have nothing to do with fenton at all other than being sold in their packaging.