Not got a recipe but have an idea. I was looking at the post by big guy a few weeks ago. My Mrs said what is that

. Well she is very handy in the drawing department, I asked can you draw that and hey presto. The one she produced was about 3-4" in size, ok, now do life/real size. Sure enough easy.
Earlier that day we had been mooching in the craft part of our local 'The Range'. General hardware store with a good craft dept if your not fam. Looking for something completely different (beads) we came across some thin foam. About 1/16" thick and lots of diff colours. The foam is dense and there is a likely looking green to. When considering the body we both knew straight away we had already seen it earlier. Simply use the lifesize drawing as a template for the body and rubber legs. The key to this thing being the thickness of the foam-looks dead on.