I was whinging about bunny slippers about this time last year I think, there's an old topic just like this one.
They still haven't been made any easier to get. I just looked on my account and I have 11 at the moment. That's a level 130 account that hasn't needed to use them for a long while and when I see them in shops I automatically buy them in case I'll need them. They've always been a complete pain in the backside to get.
I really wouldn't bother with Skelly kings legendary, he's absolutely useless even maxed out with the extra skill. It's a waste of time and effort. Getting 20 for a scroll is bad enough, never mind 300 for a useless Toon.