ive seen premade tren other than ttokkyo, made by underground labs from either pellets or powders. spectro is a major lab that makes it and its commonly found in canada, very high quality. theres a bunch of other small labs who make it too.
are you worried about quality when making it yourself? or is it you simply dont have a location that you can perform the conversion yourself using pellets?
the reason i ask is i strongly beleive that homeade is still the best way to go, you know it is dosed correctly and is not dirty, and a nice bonus is it is cheap. at first glance it may sound like you could be injecting some crudely made substance in your body, but in all actuallity, theres only 3 ingredients, yellow dye, methylcellulose, and trenbolone acetate. all 3 are harmless to humans, and cows. they do inject these things into cows so they have designed them to be safe.
but when you convert you prob remove id say better than 98% of the methylcellulose, and some of the dye. leaving almost pure trenbolone acetate.
theres actually other moethods of making it from pellets, theres notacows crystal method which yields a pure tren final product. you can view this procedure in basskillers link in his signature. very nice way to do it, and very simple still.