Past Gun Skins

So I noticed there's this whole new gun skin system, and that got me thinking, what about past gun skins? Like I specifically remember a nice gun skin I bought for my M4 at a halloween shop, it basically made the M4 white and have like red roses on it I think?

But then one day, I changed my gun skin and realized my mistake, it was gone foreverrrrrrrrrrrrrrr.............. until now?

So, my question is, is there any way that we can put past bought skins, into this new system?

I know people who still has the M4 skin still equipped after all this time so it would be interesting for them to be added. But in your case... since you changed it yourself... Idk if it would be possible...