I read a sci-fi book where three characters were in a punishment squad in some distant (communist?) future. They were on a planet with incompatible dns, so the

I read a sci-fi book where three characters were in a punishment squad in some distant (communist?) future. They were on a planet with incompatible dns, so they couldn't eat anything local. They ended up using some cloning equipment to make "hams" and grafted on extra limbs for travel rations. Anyone else read this?