Yesterday in SoHo, I stopped a little Euro family (and probably freaked them out a bit; sorry) to ask where they got the fluffy white sheepskin that lined their black Bugaboo. It had slits for the 5-point harness and, whaddyaknow, a Bugaboo tag.
Turns out it's an official Bugaboo accessory, or at least it was. Cream/white sheepskins were available last year, but according to the clerk at Just For Tykes on Mercer St, this year, only chocolate brown is available. It looks like monkey fur. Plus, it's $80.
My suggestion: go to IKEA (if you dare), buy one of those little muttons from that giant bin, and carefully boxcutter the appropriate holes from the underside. Total cost: $20. Very Readymade Magazine.