Hi Dave,
I can strongly recommend C & C cases. Talk to Chris Hine:
chris@caseman.com.au . The case for my APM 152 mm (FL 1200mm) APO cost almost $900 but is bullet-proof and beautifully crafted. I can recommend Chris of C & C cases very highly. This case has protected my scope from a near-disaster recently and is as strong as any case can be made.
Cheers,
Richard