Building Israeli FAL?

[PILMAN]

I want to get a FAL built, I have a gunsmith who will do it but I need the parts. What would I be looking for price wise and where can I obtain parts to put together a copy of a Israeli FAL? I would like to use original FAL parts if possible. I've seen the heavy barrel sold on DSARMS, how is this in quality compared to the real Israeli heavy barrel rifles sold on gunbroker? Thanks.