It's basically Kent Maxima that I rebuilt (it had been scavenged for parts in a previous life - it quite literally was just the brackets and canisters - even the connectors were gone). Doing a cursory search and came across this:
http://www.marinedepot.com/ps_ViewIt...191~tab~4.html
Although one of the user comments says it doesn't work that great with the Maxima, so I guess I'll keep looking for now, or yeah, I'll probably start emailing around. I bet J&L can order them since they sell Maxima's still I think.