I've purchased many of the specialty tools and supplies that I use for modding of anything, including flashlights from Micro-Mark.
Although the hobbyist tools they offer are generally expensive, even when on sale, they are top-notch. There are so many really effective specialty products that give me more control over whatever it is I'm fixing or modifying, at least relative to traditional or full-size tools.
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"it's of utmost importance to be strong...otherwise weakness will be exploited by your adversaries and they'll drive a truck right through it!" (paraphrased)
-former U.S. Secretary of State, Mike Pompeo
I used to buy from them often in the days of catalogs, always great tools and I still have most of them.
Thanks for the link!