This isn't one of mine - I merely stumbled across it a few minutes ago and figured that I'd post it here in case anyone wants to check it out (or get one).
A chap by the handle of sans_fi on Shapeways has
designed a 3D-printable lemming, which can be purchased in a variety of materials. The link also includes photographs of the printed model - including one that shows it hand-painted. Below is one of the images from the listing, to give some idea of the size;

It's a hell of a lot better than the illustrations that I ran through Shapeways 2D-to-3D tool, for sure.

When I have the spare change, I might well pick one of these up.
That model is from the intro in the PlayStation 1 version, and the Lemmings Revolution model.