For my Trangia stove, I usually use denatured alcohol / ethanol / methyl alcohol. Bringing methyl alcohol into Russia is apparently prohibited, and bringing ethanol is subject to a 22€/litre duty. I've understood that actually finding спирт, as it's apparently called in Russian, is potentially very difficult, according to sources (1), (2), (3), (4). One of those sources recommends an industrial site near Moscow and to pay the guard a bit of money for him to get some methyl alcohol...
Where specifically can I find fuel for my Trangia stove in Russia? I will have almost a day in Moscow before I head north to Inta prior to my hike. I've heard they might sell it at the аптека, perhaps in 100 mL bottles. But I'm also told it should be sold at camping stores. Where can I find a fuel that will be suitable for my stove?
(I will be taking the train, so aviation limitations are not relevant in my case)