Here is a pic of a very simple mobile phone holder I got from crazy clarck for only $10 !! I was thinking to use this for my Garmin Emap in my Toyota Surf untill I can save the money for the original holder for the emap ( around $85 I think ) but it seems to be quite good actually and absorbs the shocks quite well with its flexibility . The only thing to keep in mind is to use a contact adhesive glue ( like the one for the shoes ) otherwise the it won't stick with the heat of the sun with the original double face of the holder.
Thanks for your information and the good work on your web site ,