So I've noticed a long-standing bug, which I've reported on the forums for ferret already. but as it stands, Ferret Business has no way of attainability as far as unstable tool parts go. so maybe add a way to obtain the tools, for the cost of x amount of ingots required?
It is because of a mod version mismatch between t.con and ex.u, and while technically we could find a workaround it would be a huge pain to implement and for very little benefit.. Instead of reporting it here I suggest you go and report it to the t.con and ex.u devs directly so they can fix it.
https://m.reddit.com/r/feedthebeast/comments/3iqgdb/extra_utilities_tinkers_construct_cant_create/ As it mentions here, it is not currently possible to do it with the current version of extra utils.