Ceramic package with a hole?

[Ankur Jain]

Hello everyone,
 I am interested in a ceramic package for a 13 mm by 13 mm silicon chip that
has a hole on its floor where the chip sits, so that I can optically access
both sides of the chip. The hole needs to be about 8 mm by 8 mm - the shape
and size are flexible.
 If you have used such a product before, or know which companies I should
contact, please let me know. I would appreciate any input for this issue.

thanks,

Ankur.