Vishay Dale Wirewound Resistors, Industrial Power, Aluminum Housed, Chassis Mount
7.5 to 250 watt resistors. https://www.vishay.com/product?docid=30201

You can buy them Cheaper at mouser.com/
https://www.mouser.com/Search/Refine.aspx?FS=TRUE&N=12500260+4294647985+4292906361
It is kind of a cool website, you can filter exactly what you need.

I called mouser.com and they will bend over backwards to get you the correct resistor for your application. Smart Dudes
And they do sell to the public.