Thanks for the ideas guys, some good thoughts there.

I did a bit more trawling and came across these guys who sell some pretty nice suction mounts:

http://www.racerecall.com/mounts__cases.html

Anyone have any experience with these?

These guys made their own:

http://autospeed.com/cms/A_109194/article.html

Although I think by the time you sourced the parts and spent the time doing this it would be cheaper and easier to buy the Race Recall one.

Cheers,

Wrxpc