If by 'genuine' you mean Russian, then that would be a no-no in terms of 922r compliance. You generally need US made furniture to hit your parts count.
Don't be like that. Dishing out off base information like you're doing right here. There are many US replicas of gas pistons, muzzle brakes, and pistol grips that when combined with a US FCG, can get you to 922r compliancy. You can also use US magazine followers and floor plates, which put you in the happy place of using foreign furniture and pistol grips. Come on dude.
As far as sourcing genuine russian furniture, Ebay used to be a prime source. But you mostly find Ukranian refinished wood on gunbroker and ebay. It's still russian, probably, but it's been molested and sometimes doesn't quite look "right" after the refinish job. Try the marketplace of
www.theakforum.net. That's your best bet for reasonably priced russian wood with decent visual representation before you pull the trigger.
I've picked some up from gunbroker and it turned out to be Ukrainian refurb. This is a good example of it:
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=259501756
The shelac is uniformly darker, orange, and opaque. You can also see a refurb proof (square with horizontal line through it) on the stock. Russian shelac varies from blonde to orange red to dark red, but never dark enough or opaque enough to cover the grain of the wood like this example. It's probably still russian wood, but it just looks funny now.
I've got "refurbed" russian wood that came with a kit, but there are also other proof marks on it indicating Izhevsk refurbished Tula wood.
Tula proof marks tend to be circular. The "hammer and anvil" in a circle indicates Tula without a doubt. It's also sometimes called the "Circle K" proof mark:
I've seen this on my Tula Krinkov handguard, which is not refurbished at all. Those proofs are very distinct. My Tula AKM kit has tula proofs, but they are faint as they've either old and somewhat worn, or a very thin layer of shelac was applied in refurb land, which is Izhevsk as I can see distinct izzy proofs on the wood, too, which look fresher than the older Tula proofs.
Diamond / triangular proof marks indicate Izhevsk. The more common Izzy proof, often found on handguards, is the "PB" in a diamond mark:
It's really difficult to get your hands on non-refurb russian wood. But it's not too difficult to get your hands on russian wood furniture that has been refurbed
in Russia. Shelac color and proof marks can help you identify if it's been done in Russia. Russian wood will have a square and line proof mark, but will also be complimented by the proof marks that I listed above. If there are no proof marks except for the square with a line, then it's probably Ukranian.