Using obscure parts or parts that originate from an obscure source is something I would strongly advise against. It might be okay for a build that you do for yourself, but this is definitely not something you want to be part of a kit that you sell to some other, maybe inexperienced, builders.
I am pretty sure you don't want to test each and every component that you are planning to send out, so a word of warning is due here, I think.