In reply to thompsongirl:
No idea what the make up will be, but sure you can ask. Sure the same applies for ensuring it will be the right challenge for you.
Marmot tours may be worth a shout.
Exodus is always a worth a look for the single but no idea what they have on road bikes at the moment. Though I'd be tempted to do their Wadi Rum on a CX.
Rapha have some.
Anyway should you find anything let the world know, I know of a few ski holidays but none for the cycling. Solved this years problem by just going to Mallorca with some friends and then Norway with 2 of the guys, but there will always be next year