In the article attached, the authors looked at peripheral T cells expressing CX3CL1 and found pretty low expression, which isn't that surprising.  Those that they did identify were mostly Th1 CD4+.  There's a chance you might find it in monocytes but there doesn't seem to be much useful literature out there on that.

https://www.ncbi.nlm.nih.gov/pubmed/12966591

 Thank you Chris.