Obliterators of Nurgle are ever popular choice for Heavy Support slot in Chaos Space Marines army. As it is with all minions of Nurgle, creation of quite unique models is not so difficult task. However, sometimes people offer home-build miniatures re-cast in resin as a quick solution to buy. Below are such miniatures, offered on eB for ~50 USD / squad, i.e. the same price as GW failcast product.
For comparison, I will show another option accessible via some Russian website.