In reply to davidbeynon: No, sorry. As I said I've always just used petrol. I do remember some people suggesting broken chips of hex tables - that could work. The UL crowd seem to be rediscovering hexy style stoves so various types seem to be becoming more available - is Esbit? Or some name like that.
TBH it is probably a couple of years since I last used my Whisperlite. Most of my camping now is over night trips whilst climbing for the weekend and I just chuck in my Jeboil. When car camping with the family we have one of those bigger gas stoves that come in things that look a bit like a briefcase, and take the long butane canisters you can buy in DIY shops and garages.