Ok, so while I'm either waiting for a Nikwax delivery from the US, or find an alternate product here (will look into butcher's wax), I did a little experiment.
I took some beeswax pellets that I had lying around and tossed them into a ramekin used as a double boiler. I melted them, but it solidified immediately and was too hard to use; given that my hairdrier burns my hands, I don't know what it would do to the glue in the boots. So I consulted our good friend google and asked around. Many websites suggested adding terpentine to the mixture (I googled Homemade beeswax leather waterproofer), because that apparently helps keep the wax soft as well. Some add both terp and oil. I don't like the way terpentine smells, and didn't have any on hand anyway. Sunflower and linseed were the most popular, followed by olive, but that was more for soft leather like coats and hats. Plus it does go rancid- blech.
I also discovered that sunflower oil has an uberlong shelf life, it basically doesn't go rancid, and since my cooking oil happens to be sunflower I added just a little- less in volume than I had in beeswax, and voila, I had a wax that doesn't solidify so quickly and still gets pretty hard when it cools down. I'm just not sure how anything too soft (think softened butter) would be long term on the boots.
I kept it melted in the double boiler while I applied it to my soles. It seems to have worked. I could probably apply more, and might, since I'm rather impatiently waiting for the store to give me information on the arrival date of my blades. While the soles feel waxed, they're not sticky at all. I'll be keeping an eye on it to see how long it lasts.
I'm saving the remainder, and next time I melt it down, I might even add a little more oil, just to aid in spreadability, but the composition I had worked pretty well.