Just a follow up: Got all 12 SKINs yesterday. 
Oddly had to search for the ship class for them to show up so without a search they didn’t show (yes I’ve set the filter to sort by price and cheapest first) so I guess maybe that’s intentional and part of teaching new players about finding them or something (don’t assume it was a glitch as I’ve signed in twice and had the same result before buying them and had several hours pass between the two so I guess it is intentional by design).