I have a complete set of furniture including a bi-pod for HK 91/ G3 / PTR / Century pattern rifles. If you were to order these parts it comes out to over $650 before tax or shipping. This is a really nice set that came with a rifle I recently purchase but I am just going to leave my gun with the BFPU standard furniture. $300 for the whole lot. 

Stock: Michael Machines Club Foot G3 stock with enhanced recoil buffer. (Retails $425 alone) 

Cheek Riser: AC unity

Handguard: AC Unity

Grip: Ergo Grip

Bi Pod: From HK parts all metal