The spec sheet has dimensions & VESA mount size at least (crazy it wants only 400x300 - I have an old 42" with 400x800!)... but if you contact CI support, they should have drawings with the exact location of the VESA holes and other items.

EDIT: Oh, wait. Here you go:

[Link: sonypremiumhome.com]

Looks like it wants the SU-WL500.