It would be nice if HTC had a small file comparison tool players can download and run against their skins directory which will tell them what is missing so they can then get the missing skins from the web site versus the background update while in the game.
Or have it imbedded in the game itself, so you can run it while in the hanger. Then it will produce a text file inventory of what you have and what's out of date, versus what is currently available at the web site. Or, then you can just turn on the auto updater as usual.
I realize this places a burden on Skuzzy to keep something up to date that the comparator works from. That is a very large negative consequence to this wish along with my apologies to Skuzzy.