There are a lot of special event chars out there, that are impossible to get now. Snowmans, Krampus, Eddiebirds, pumpkins, wickerdeers and so on. For the collectionists this is a big problem. That's why i would like to see them in the store some weeks after the event ended in special souls, which could be purchasable via frontier coins...so we still would have a motivation to buy the souls, since it's hard to waste frontier coins just for the collection...but waiting a complete year, just for a chance to complete the collection is crap.

Some alternative ways to get them would be cool too... any other ideas?

maybe some special event which can drop event char souls, or fragments for them or something like that?
many other games have the possiblity to farm for toons in a long run, just we miss this possibility and waste a longterm goal for endgamers like me...would be cool to hear more thoughts about this...