This guy here? If that's it I can get the dimensions of mine later today. I have no idea if that is a standard part that is still available or not.
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I measured mine, but I won't be able to post a decent diagram with dimensions until tomorrow or Monday. I don't know what it's called either. You could print that picture and take it to a marine store to see if they have anything like that. It may have been custom made.
The bottom piece of bar is 8-5/16 inches long, the handle part is 2 inches high. The handle is welded 1-1/2 inches from the left side and 2-1/8 inches from the right side. That makes the handle about 4.6875 inches wide. It is made of 3/16" or 5mm stainless bar. You might want to measure that depression in your locker to see if those dimensions are similar to what you need. I'll try to get a drawing posted in the next couple days.
Good luck!