If price is no object and you don't care about flexibility (i.e., ability to change caps) I think the CCM4Vs are the optimal choice. They're also very expensive.
That said, Doubled has some CCM4s for sale in the yard sale for $2750, which is an insanely good price. Not quite as good as CCM4Vs for stealthing, but quite good.
How to stealth? Think about hats. I'd be more worried about what to do about the 722
The beauty of the CCMs is exactly what you identified - just plug 'em straight into the 722 and go.
For a less-expensive option, you could also use a Schoeps KCY cable with MK4V capsules and a "PFA", which is a custom part you'd have to get made by Naiant and then cabled by someone else.
For what you are doing, and given you already have the 722, I'd just get CCMs.
I don't know the best place to buy in Europe/UK. Given exchange rates, if you ever made a trip to NYC, you could buy them from Jerry Bruck at Posthorn and probably still come out ahead
I'd PM ianmacd on here. He is also in the UK/EU and he has been running CCM41Vs quite happily for a while. I'm sure he can help you out.