For what it's worth, I picked up a "sllime green" 12 volt compressor for my motorcycle and also have one for the XF. I think you can buy a kit at walmart that includes the sealant and compressor for around $30. I won't use the sealant, but I do carry a tire patch kit that worked very well on the motorcycle when I used it. The kit fits right into one of the slots under the trunk mat.

Good luck,

Doug