OK, time for plan B. Don’t give up yet.
Contact a few of these guys to see if they can help:
http://www.remington.com/support/repair_services/specialty_parts_dealers.asp
Now, if they can’t help, I seem to recall someone telling me that the 341 used the same cartridge lift feed system as the model 34, which was made right before the model 341 was produced. That could be another source for the part you need. There were a few more mod 34’s made than mod 341’s so you may stand a better chance there.
I would also trying posting on other sites like Thefiringline.com, Arizonashooting.com and some of the rimfire sites. I don't recall what they are but I think one is Rimfire Central or something? Maybe someone else here can help you with some rimfire sites.
I hope that helps. Let us know how you make out.
Oh yeah, FYI, I also ran across this info while searching and thought you might it to be of interest:
The Remington Model 341 "Sportmaster" Bolt Action Repeating Rifle was introduced in February 1936. Remington offered the rifle in several different configurations:
· 341 A Standard had a step adjustable rear sight and white metal bead front sight. It weighed six pounds and initially retailed for $13.90.
· Model 341 AT Special was the same as the Model 341 A Standard except that the receiver was drilled and tapped for a 4X Weaver No. 344 scope and No.3 mount.
· The 341 P had a Remington Point Crometer rear adjustable sight with two interchangeable discs, hooded front sight with four reticles, specially configured stock, restyled bolt handle, military-style safety, heavier target barrel. It weighed six pounds, four ounces and initially retailed for $14.80.
· 341 PT Special was the same as the Model 341 P except that it was drilled and tapped for a 4X Weaver No. 344 scope and No.3 mount.
· Model 341 SB Smoothbore Rifle was intended for .22-caliber Long Rifle shot cartridges only. It had a white metal bead shotgunstyle front sight and no rear sight. It initially retailed for $13.90.
Remington offered a Lyman No. 422 "Expert" 4X scope for the Model 341 starting in 1938, it retailep for $8.25 when ordered with a rifle.
The Model 341 was discontinued in late October 1940 and replaced by the Remington Model 512 "Sportmaster after about 131,604 Model 341 rifles were sold.