Supposedly the U.S. Navy is moving to Ospreys for carrier onboard delivery duties.
I read that the U.S. Navy buying something like 40-50 Ospreys for that role, and retiring the C-2 Greyhounds they currently use. There will still be E-2 Hawkeyes in the carrier-based AWACS role, and Northrup Grumman is in the middle of the latest production run of those right now.
And the USMC uses Ospreys for onboard delivery on the helicopter carrier/landing dock ships it operates on.
So if the RN can probably call Uncle Sam if they run out of parts or people on some future carrier mission.