I think most places that sell motorcycle brake lines will sell the banjo bolts too. It is pretty common stuff.
If you want to order, then last place I saw these was carpimoto.com
Bleedingwise, however, the nipple will not be at a best level possible as it is sitting to the side or downwards from the master cylinder. Ideal place would be the highest point of the master cylinder chamber as this is where an airpocket might form.
You might have to take the lever assembly off and tilt it on its side while bleeding.
If you want to order, then last place I saw these was carpimoto.com
Bleedingwise, however, the nipple will not be at a best level possible as it is sitting to the side or downwards from the master cylinder. Ideal place would be the highest point of the master cylinder chamber as this is where an airpocket might form.
You might have to take the lever assembly off and tilt it on its side while bleeding.