The york can squeeze in next to the oem A/C, I think you can buy brackets for it. In another post a member posted a pic of his set-up using another oem A/C comp stacked on the curent A/C comp.
You also have the 12vlt comps, ranging from about $70 for the Superflow MV50 to $400 plus for a Viair. I run a couple of the Superflow, one for my ARB, and the other for airing up/reseating blown beads, etc.
A search should lead you to the comp. posts.
