CTBTL
There may be a fair bit of money sloshing round, but to buy helicopters long-term requires a planned allocation of funds to cover the procurement period, this will be from an emergency pot of cash from under Gordon's bed (or Comd JHC's) to buy something quickly, this is just one finger going into the leaking dyke (cue some worrying banter about a less than PC topic).
The Merlins are in the showroom and ready to drive away, if there were loads of Chinooks (please don't restart yet more 'If we had the Chinook Mk3...'), then we would probably be buying them. The other types are a bit of a non-starter as they are not available and we are adding to a current inventory.