Try gun shops want ads, e-gunparts.com gun shows.
Less than $100. SS Kresge is the original name of KMart. I just saw a S.S. Kresge 151 12ga for sale for $85 on a site that seems to price its guns a bit on the high side. Here is the related description: "$85, S.S. Kresge 151, 12 GA, 90% blue, excellent bore, good stock, 28'' barrel, 2 3/4" chamber Full choke. Light surface rust spotting on metal. Wood shows minor dings and scuffs with finish wear."
Possibly your best source of parts would be a junk Spesco mod.151.
where can i buy parts Kmart
To break down a Kresge 151 12 gauge shotgun, first ensure it is unloaded. Open the action and remove the fore-end by loosening the retaining screw or latch. Next, pull the fore-end forward to detach it from the barrel assembly. Finally, you can separate the barrel from the receiver by removing the hinge pin or any securing mechanism, allowing for easier cleaning or maintenance. Always refer to the manufacturer's instructions for specific details related to your model.
Ensure that the gun is unloaded! With the gun closed, pull down on the forward end of forearm. It is held in place by spring pressure and will detach without tools. Now open the gun and the barrel will detach. It's that simple.
I have one of these and have never seen another
your gun is only worth about 100 bucks i have the same gun here www.gunsamerica.com
50 USD
50-200 usD
60-100. 100 if perfect.
No much, I think. It's a "out of line" gun (discontinued). You can find out it in some dealers about U$50 . But it's a reliable gun, if in good condition.