E350 chassis mount spare tire

Hi all… I’m designing a chassis mount for my 37" spare tire… chassis will be cut & modded with a 38" steel ring welded in place… i kinda like the mercedes swing down carrier design… I don’t want bumper or door mounted - as that space will be used for outboard motor & ebike…
Any ideas will be appreciated
p.s. I’m a mechanical designer & the frame will be stronger than stock…