Hi Kevin,
Here's some information from the Osprey Publishing ' Cromwell CruiserTank 1942 -50', by D Fletcher & R Harley, that might help a bit!! :-) :-)
Quote p35
No reason has ever been found to explain why Centaur AA tanks should not have replaced the unreliable Crusaders with the armoured divisions in Europe. However, by October 1944 the order for Centaur AA tanks Mark I had been cut back from 450 to 100 and it's replacement the Mark II, probably only existed as a single example.
end Quote.
So based on the fact that there were limited Centaurs available and they would have been issued as replacements, I would say best guess would be yes, they may well have been mixed with Crusaders.
Hope this helps a bit. I now wait to be proved wrong. :-) :-) :-)
Cheers
Al