Where would one look for original Russian type 1 (the $$$$ stuff) parts? Especially barrel and RSB/FSB, etc?? Are they even existant and what would I expect to shell out if I could find it? Searched the normal online gun sites to no avail.

Don't you already have the barrel, RSB/FSB? As far as parts you're gonna have to scour the EE here, and on the various AK forums.

The parts are gonna be pricey. If you're asking about how much a barrel, RSB/FSB would go for, you'd  probably get more traffic on the dedicated AK forums that get more traffic, as you have probably noticed already due to posting pics of said above. Good score where ever you found that front end, however it will be the money pit from hell unless you know what you're in for.