Welcome to Ecomodder.
When I got my diesel car, I put in a few tanksfull [tankfulls?]
But there is only one dealer in the county. I have a car that burns clear (ethanol-free) premium and there are two choices the same distance away. The convenience of being able to pull into any station and finding what I want seduced me.
Biodiesel Retailer Listings - Biodiesel.org
Have you searched on "biodiesel [your location]"?