When this happened to my son and daughter-in-law's oven, he bought a sort of black steel towel rail, but it was too short to bridge the space between the bracket-holes in the oven door.
We didn't wanna drill new ones, so I lengthened the steel tubing of the rail with some bits of delrin with spigots turned to a tight fit on the I/D, and tapped to suit the screws to the brackets. I put titanium washers on the screws securing the brackets to the door in the hope of slowing down heat transfer.
I could probably have done without them because there was no trouble with either the delrin or the rail heating up even on big roasts.
But if you can get a new one for 50 squids, Bernard above could be right, depending on how tight money is. So far as I could tell, the pukka item for my son's oven was unobtainable, so making or adapting something was the only choice short of a new cooker.