Try e-gunparts.com
your Winchester model 1892 sn 13156 was made in the first year of production which is 1892.
http://www.wisnersinc.com/ They will have what you need!
You will have to contact Rossi or find one of their catalogs
If that barrel is less than 16 inches long and you are in the US, you have an illegal firearm.
I can't find any indication that they made a 30-06 lever action. I can't find any indication that they made a 30-06 lever action.
on classic fire arms llc
Try e-gunparts.com and Marlin
Gun shows, gun shops, Shotgun News, e-gunparts.com, want ads.
On line auctions.
You will have to contact Rossi
Gun shop, gun show, pawn shop, want ad, for sale ad, garage sale, estate sale, on line auction.
You must have a Western Field Model 72C lever action rifle, which is a Mossberg 472C. Try gunpartscorp.com or eBay for an owner's manual. A repair manual is going to be tough as the gun is not well known.