Yep, that's the one you need if it's widescreen with motor drive to lower the screen to access the nav drive, and x2 SD card slots.
The drives are very fussy about the media you use (Verbatim plain silver discs best) and require a drive to burn it on at slowest speed it supports (mine does x4) that's known to work. Asus DRW-24B5ST is your best bet in terms of being able to get hold of a current one
Does it take big capacity SD cards OK? It looks like a Mk2 RNS-E in which case it'll take cards over 4GB, whereas earlier ones won't. The chrome volume and big wheel knob are usually Mk2 features, although they can be swapped on earlier ones. Firmware versions are different on them as well - from memory the last Mk1 firmware is 0650 and the Mk2 units are 02xx format (although that's from memory)
Expensive retrofit anyway It's what my S8 has too, although mine's the earlier unit