If someone has a template or more precise measurements (preferably in metric) for those cases, I could try and whip something up for ya.
I presume raphdude is referring to these: http://www.casetopia.com/Viva_Elite_9_Disc_Blu_ray_Case_25mm_p/br9-elite.htm
If so, they appear to be standard Blu-ray cover dimensions with a 25mm spine. I would design 3341px (1523+295+1523) x 1762px at 300dpi.