Limited Skins availability potential
I have been playing League for somewhere around 5 years now and have come to realize its probably my favorite game even though I do occasionally get tilted I find myself coming back for some reason. My question is in regards to Limited skins in particular in the shop. While I know some skins like the OG Pax Sivir and TF, or even the ranked skins for placing gold are extremely particular skins that I can honor being vaulted forever, I find myself disappointed I cant obtain skins for champions I never new had skins because either I was to young to play league or wasn't ever offered the chance to obtain them knowingly. Particularly skins like Young Ryze, Black Alistar, Unchained Alistar, Rusty Blitzcrank. I am sad because If I love a champion (in my example Alistar) whom is max mastery level on and try to obtain all of his skins I never can because 2 skins of his are limited meaning I have no way of ever obtaining those as far as I'm aware never can. Is there any way in the future skins like those could ever become available to unlock? Or is there any way I can obtain these skins still?
I ask because I really have been sad knowing I can never get Black Alistar or unchained Alistar and even skins I was able to obtain thinking they were crazy special have come to be re--released or offered through some other means like championship skins, or older event skins like Snowdown themed skins or golden chromas. As I stated earlier even a limited skin such as PAX Sivir or championship sivir were eventually re-released for sale so why couldnbt others be too? I just feel as though if not sold straight through the store they could be random draws into some peoples My Shop or even offered as Gemstone skins because of how hard it is for people to obtain them. I appreciate any input and hope others feel the same. I also want to add Black Alistar I know was like a collectors edition skin I believe along with a few other skins, but even Goth annie and Huntress Sivir which are just as old are still offered in the store.