I'm sure Bell/Boeing are looking at other countries that have a VSTOL capable flat deck as potential sales markets to include: UK, Italy, Spain, Australia and Japan.
Schmidle raised it on the USS Wasp during F-35 trials, in front of UK and Italian senior officers, all of whom were transported on and off via V-22.
The issue (as always) is that V-22s are not cheap and Defence budgets continue to shrink. Perhaps a USMC det onboard QEC is a more realistic proposition than buying our own.