Remington 58 Sportsman Mag Cap

[BirdMan]

Hey guys, this is my first post here. I recently acquired a Remington 58 Sportsman 12 ga from my grandfather's passing. I'm not new to guns by any means though. When I went to get the gun I saw it was missing the magazine cap which is a bummer because I believe 58's were discontinued in the early 60's (correct me if I'm wrong). I have looked everywhere trying to find a magazine cap. Craigslist, Ebay, gun websites of all kinds. I would prefer to have an original cap instead of having one made at a gun shop for 40 bucks. Any body got one or know where I can get one for a reasonable price? Any help or offers would be greatly appreciated.