870 Forend tube replacement

[colestewart]

Does anybody have a forend tube assembly for a Remington 870 Express Supermag? Or can anyone guide me on how to go about fixing it? Threading on it for the nut it attaches to snapped clean in half. Can’t find anyone who sells them online or around me. Only ones I can find are for the Express Mag which has a different slide mechanism. Super frustrating

[Rubone]

There are some on eBay for super express 3.5in.