AJ:
I bought mine from the folks in Nyack (Bell-Solton). It's a perfect fit for the X1; only, it needed a little reinforcement to protect the edges from ripping, so I went to Home Depot and got 6ft Aluminum angle strips and cut them to size and bolted them to the edges of the case. Now I've got a "fortress" built around my X1. I just don't know if they still carry them since it's been two years. Hope it helps.
regards
Mario