FabTech also has a universal spare tire carrier. It's also adjustable for 31"- 35" tires. Here's pics of mine, still contemplating drilling into the bed or continue to save for a bed cage. View attachment 16317View attachment 16318
You could take that tire rack and make a frame kinda like what I started out with and weld it to that. That way you wouldn't have to drill holes into the bed.