TomTom 910 - I need mount part number

I wonder if anyone here has a TomTom 910 GPS unit.

TomTom has a problem with the mounts initially and they upgraded them.
The first batch of mounts would sag and have connectivity problems.
They came out with a new mount which solved the problems.

last year they sent out replacement mounts to people that had the old mounts.

The way to differentiate the mounts was that the first batch had only Loack and Unlock icons while the second batch had three idons - Lock, Unlock and some EYE icon.

I just heard about the replacement program - but I stopped using the mount last year and just used velcro in the car. now I would like to get the new mount but I need to provide Tom Tom with a Part Number that is provided on the old mount.

Can anyone give me the part number off their 910 mount unit?
Thanks in advance.