Just wanted to say welcome to the SC Chapter of FTE...thanks for popping in.
I also came up short when looking for some BIO fuel locally. Its been a year since I last looked into it. I will ask around again and see what i can come up with.
I cant put you on boideisel but I can reference a good lawn & garden center!
If you need anything go by L.D.I.\Lawn Dynamics on Ebeneezer rd. (Florence SC) and speak to the owner\operator...Will (my brother).
Tell him Ed in Greenville sent you and I'm sure he can give you good deals.
He does anything from mulch & plants to fountains and swimming pools.