stapfam,

These folks have some very high end stuff for the video industry and probably have something that can be adapted......for a price.

http://store.zacuto.com/


These clamps are versatile and can probably can be found in the UK...........but weigh almost a pound.

http://www.bhphotovideo.com/c/produc...ml#accessories


Here is something else that may be more like what you are looking for......

http://shop.helmetcameracentral.com/HERO-MK-RIDE.html


This is certainly a clever and inexpensive mount......

http://www.knick-knack.com/howto/mot...era-mount.html