Walkie-talkies with pushbike mount?

[HotPhil]

I'm off on a long bike ride soon with a couple of folk, and in a practice ride we've realised that bike-to-bike walkie-talkies would be a great aid. I can find plenty of good small walkie-talkies out there, but struggling on ones that can be mounted on bike handlebars. There's some Doro ones (WT66 I think) that come with bike brackets, but was wondering if anyone knew of any (cheaper) ones.

Alternatively, does anyone know of anywhere that sells 'universal' bike mount walkie-talkie (or mobile phone) holders? They also seem hard to find.