CombatStocks appears to have the best price on the ATI MOI0600 Mosin-Nagant M91/30 Scope Mount Kit with Bolt. Shipping costs only $6 per kit, or $11 for two kits.
MOI 0600 This newly designed mounting system for your rifle is comprised of a scope mount and replacement bolt handle. The scope mount is made from T-6 aluminum with a black anodized finish. Fits round or octagonal receivers (rifles or carbines). The bolt handle is polished stainless steel. System includes assembly hardware and detailed instructions. Unconditional Lifetime Warranty. Manufactured by Advanced Technology, Inc.
Mosin Nagant Scope Mount with Bolt Handle
•Unique scope mount made of Hard Coat Anodized T6 Aluminum
•Allows scope to be mounted over the receiver
•Bolt handle is polished stainless steel
•Assembly hardware and detailed instructions included
Online Instructions: http://www.atigunstocks.com/download/PDF/MOI0600_instructions.pdf