Hope your gf won't kill me...
The drill bits are pretty usual, not some extra grade stuff, I used some HSS-super ones, and also cobalt coated ones, found them locally, that means they are VERY easy to find, cost about 5 euro a piece.
Copper bars, that's another story. Spent approx 2 months to find any copper thicker than 2 mm here, finally got some bus bars (transformer bus bars, used), and now I know several places where to get them. Try looking into metal scrap yards. Still dunno where to buy thicker than 10 mm and brand new...:shrug:
I bet you'll find some good quality tools (even sec. hand) there.
Still,
Hope your gf won't kill me...