I would start my search at Numrich gun parts corp.
Depending on condition, about the same as any Marlin 70 rifle.
www.midwayusa.com
The Marlin 780 dosent use a clip, it uses a magazine. You can get these from aimsurplus.com
go to sears pick up a magazine and wow u have a sears magazine
Never heard of a Winchester model 80. There is a Marlin model 80.
Yes
Magazines available at ammoclip.com
AnswerThe 915y that I have is single shot only. There is no place for a magazine. The short answer is no, a Marlin 915Y can not be converted to be magazine fed. The long answer is that with enough money and effort it could be done by a competent gunsmith, but I suspect that it would cost hundreds of dollars to do so.
The Marlin 795 has a built-in feature that prevents the gun from firing without a magazine in place. Though, the modification to reverse this feature is very simple.
dick williams gun shop
Factory magazine for Marlin 80 DL $18 + $7 shipping at ammoclip.com
I need magazine tube with spring . rifel model 81 dl 22 bolt action.