5x8 Cargo Trailer Conversion - Spare Tire Mounting Advice?

[cascadiarunner]

Hi all, I recently picked up great little converted cargo trailer, lots of cool features! However, it doesn't have a spire tire. I'm trying to figure out where to mount one when I do get one. Ideally it would be on the wall above the fender but it's already been insulated and finished and I don't want to have to rip that out. It does have heavy duty fenders, any thoughts?

Thanks!

 

[eriefisher]

You could mount a bracket on the side of the tongue box if that's secure enough or maybe on the rear door????