You cannot use gasoline in your glow fuel engine. Glow fuel is a mixture of methanol, oil, and nitromethane. There are probably other additives in some but these are the major ingredients.

The instruction manual should have at least a general fuel recommendation that includes oil content and nitromethane content. Pretty much any brand of fuel that meets the recommendations will be fine.

It is often preferable to find a local source for fuel. It is often very expensive to mail order due to hazardous material surcharges. Your local yellow pages, or thr phone company web site, is one place to search. I typed 'hobby shops manchester nh' in www.google.com and got several pages of results. This site has several shops listed in NH but I have no idea how close any of them would be.
http://www.monsterrccentral.com/hobb...ew%20Hampshire

There is also a hobby shop locator on the AMA site http://www.modelaircraft.org and it has 3 results for NH; in Pembroke, Hampton, Salem
There are links to other locator sites on the same page.