it is just a 20AMP relay with a mount. you should be able to source a relay locally for 20$ or less.
or you can cheap out and go to the junk yard and pick up some monster AC relays for cheap and JB weld on a tab to bolt it down.
remember pinout ;
easy way to remember is 85-86 are the mag lock, 87 and 30 are the pathway
--Steve