Matter Fabricator is the greg tech method of producing UUM.
I honestly recommend going into the config and re-enabling the mass fabricator though. The matter fab needs 8 iridium ore and a ton of other stuff to get it. This means you would need to find at least 4 chunks of iridium ore and use silk touch to get the ore and macerate it. With default odds of 1 ore in 5 chunks, that's 20 chunks you would need to strip mine by hand to get. 1 64x64 quarry is just shy of 16 chunks. However, quarries don't have silk touch, so you would need to find 8 pieces...which would take 40 chunks, so more than 2 64x64 quarries completely mined out. Oh, and I've yet to find any place Iridium Ore is more likely to spawn. I started finding it at about the 15th layer or so down ( so we're talking 60ish. ) When I did the math, it was going to take me 4 quarries running for 1 week to get enough. Yea, right. Not going to happen, lol.