at least taurus will let you have some of their parts--LOL
a long time ago numrich had a shit load of mini take off stuff dirt cheap too.
like 6.8spc barrels, 7.62x39 barrels --
at the time i thought i would buy one of their 7.62x39s--but they turned out to have the wrong bore diameter for 7.62x39 --and the 6.8s had the wrong twist rate and chamber--
i don't know what the deal was with their 223 barrels --but they had a bunch of them for $39 each, seems like they were 1-11" TR
many of the mini-14 take off ruger parts i run across are well "sub-optimal" to say the least.
haven't seem much in parts for the minis in a long time.