They have just covered the Apex regs or are in the process of doing so.
The book I had looked at is located on the following website http://www.airspeedpress.com/
Parts can be ordered from several places, here in the UK you need to be a service agent
Scubapro are a pain in the backside re service kits - they just won't let you have one unless you are a service agent. I couldn't even get them to release one when I was in Turkey last year to the tech guy in one of Europes biggest centres !