I'm sure you realize that the cressi computer is not a cressi computer. Cressi doesn't make computers - it's a Seiko they slap their name on. Actually the Tusa IQ700 is a seiko
Tusa SCA-343 Console, Computers: Nitrox, Tusa, Tusa SCA-343 Console and can come in a 3 gauge console...
And that one will pop out easily and Zeagle has just come out with a great idea (oh.... it was mine!) to offer a bungied wrist strap for that computer:
Zeagle Tech Wrist Mount, Zeagle Accessories, Zeagle, Zeagle Tech Wrist Mount
We used to carry cressi - but ran into a fair number of customer service issues that led us to stop carrying that line - especially when the same computers were available from companies that have top level customer service like Zeagle and Tusa.
So unless Cressi had seiko do something totally different for them... I'm sure you could use the same wrist boot... It fit on the original Archimedes... I just haven't check out if cressi changed anything as far as the form factor on the II... but I'm 99% sure it's the same as all the others...