Give Hyper Sports and Racing a try (
www.hypersr.com iirc). That's where I got mine from, many moons ago, and that houses two Autometer gauges. They'll easily accomodate your Apexi meters and, they'll cut the hole out to fit them for nothing too !
Just to add, these are full, GRP 'A' pillar replacements, not just a pod to attach to the 'A' pillar !