Need source for 1891 stock reinforcing bolt nut

Who is the best source for Model 1891 parts? I need a stock reinforcing bolt nut. --TIA

Mosin Nagant Rifle Parts and Accessories

These folks should be able to help you out.

Also found this, not parts but outstanding instructions with photos, in case you have not seen.

Mosin Nagant Rifle Exploded Views and Disassembly

Wow! Thanks Gun Surfer. What a fantastic web site. I have inquired about the availability of the part I need. Thanks again.