Housings are generally compatible with the whole range of strobes on the market. Yes the z240 should work. If electronic sync (vs optical) then you would need the appropriate cable as it uses a different connector from the ikelite strobes.
While Ikelite strobes are lovely, they're also big and bulky and the controls are hard to grip UW. I honestly found them quite frustrating.
I think the best bet to figure the options in a specific case is to call one of the dedicated UW photo stores. They're all generally very helpful.