TBS Oblivion build 42mmx42mm 4-in-1 ESC

So I’m looking at using the TBS Oblivion frame and building a quad that uses other products. The problem I’m having is with a 4-in-1 ESC. It has to be square and no more than 42x42mm. This seems to be a rarity and I don’t want to go down the TBS Powercube route. Does anyone have any suggestions for alternative 4-in-1 boards that are 42x42mm?