I think I found them in one of the Epis I BKP'd up as well. If it's the guitar I think it was, they did sterling work, it was the last guitar I gigged years back.
I seem to remember I did have some feedback issues early on, but I usually managed to sort it with tiny tweaks to polepieces. Then when it all rusted together after a few gigs it was right-as-rain :lol: