Hope you manage to create an improved and expanded version...
Well, in Belgium you still see them popping up for nice prices. 25-30 euros, which is fair in my opinion.
EEEK. That's too much for me... I only had my original one untill recently... then found 2 lots on ebay from the same seller, several zoo parts, and those stairs on each one. Since I liked the parts anyways, I got both. And found one with a GREAT BIN price while I was "seeing other auctions" (buy MORE! save on shipping!) of something else I purchased...