I found this one but the one I got from ebay I cannot find. It was only $29. I think either of these will work with minor modification. Both may have to be bent a little to fit and of course drilled.
https://www.ebay.com/itm/SLOTTED-RAW...QAAOSwnDZUJz4C
https://www.aliexpress.com/item/3292...archweb201603_