when i was looking to get my feed and return lines i just bought the feel line and fittings (4an) off ebay and the return line and fittings off ebay as well (dont remember the exact an size so i dont wanna give u a false one so just ask around someone will tell u what size to use)... as for the fittings that go into the head... i tapped into the rear of the block rite beside the starter which i'd recommend but i think that hole is the same size... but as for them fittings u can get them at ur local hardware store thats what i did... when u remove the plug thats in either the head or block now just take that with u to the hardware store and match that to the fittings u need...
i have a hard feed line on my car and i couldn't imagine making one from all the way back tehre to the front.. the head was alot more convenient for me at least.. cutting the bracket is nothing really scary to do..
I thought copper was no good for automotive use because the constant vibration will cause it to case harden or something like that - some sort of metallurgical phenomenon. I don't know the term. Obviously.
Also, make sure you acutally have oil pressure at that fitting on the head. Somebody (ZX3focusguy maybe?) trashed a brand-new turbo because there was no oil pressure at that fitting.