Jerry can assistance with mounting

[RST from TN]

I have done a little bit of work to the truck recently. I also need to mount 3 Jerry cans that I already own with the mount. 
 

I can’t go under the spare and I really do not want to mount them in the truck bed. All I can see is what I have pictured here. Does anyone else have any other ideas? 

[KARNUT]

27 minutes ago, RST from TN said:

I have done a little bit of work to the truck recently. I also need to mount 3 Jerry cans that I already own with the mount. 
 

I can’t go under the spare and I really do not want to mount them in the truck bed. All I can see is what I have pictured here. Does anyone else have any other ideas? 

Looks like you have fuel carrying capacity covered with a transfer tank. That’s usually all I needed with addition of a pump. Along with that one can. 

[RST from TN]

Yes, but that's only 55 gallon I need 80-gallon aux fuel to complete our offroad trip we are taking.