Need to replace high top window lost in N Devon

[Stefvan]

Here is a picture of the window in my High Top, it is double glazed and opens outwards. I don't know the manufacturer but the other windows are made by ParaPress.
[IMG:696:644]http://i95.photobucket.com/albums/l122/ ... window.jpg[/img]
The other half was driving back from North Devon to Exeter and somewhere between Barnstaple and Tiverton on the A361 the window came off. Unfortunately she didn't notice till Exeter.
If anyone lives near Barnstaple, please keep an eye out for my window, which may be lying on the side of the road ! It's 590mm x 165mm. There is a reward of £75 if it's intact.
In the meanwhile I have resigned myself to trying to find a replacement window, so I will need a window that is slightly bigger. A single glazed sliding window would be OK. If anyone knows of a source, I need as much info as possible !

tia

Stefvan