Well, given the keeping properties of Ansco 130, you could make a bigger order to amortize costs?
Otherwise, I found that PolymaxT is a pretty decent substitute, and has a slight edge over Dektol in terms of look. It's a commercial product, but it might be easier to find.
You might want to have a look at the recipes in here:
Or invest in The Darkroom Cookbook, which has quite a few formulae as well. The authors' explanations should help to guide you.