I think you're the guy to get these out on the market and in your product line...

It looks like a select few people have managed to find manufacturers. The one I found looks to have turned out to be 2500w instead of 5200w but the base itself is obviously no different.
I'd probably be willing to go $40-$50 assuming it's the right length and wattage. I have a Boil Coil for my kettle but need a straight element for my RIMS tube and the Brewmation one is too long. The BrewHa one is $45 but they have a minimum order of $200 so I'd have to get a few people together. I also need to get more details from them on the wattage and length. Maybe you could work a deal with them and resell theirs?