I have some misc. pcs of 0ga (more than enough for the Big 3 install) and lots of 2ga, crimp rings, inline ANL fuse holders and ANL fuses.
Look here; 0ga cables, that I made for my HO/ Big 3 install. I added the boots and polarity tags just because I wanted it to look at nice as possible. If you were to let me know the lengths, I could make them up for you as well.