I took some pics of my glovebox hinge. I had to go by the local hardware supply today and saw some 2 1/2 inch continuous hinge material that would work. It had no holes and had 1/2 wide hinge spacing. If you could find the right size torsion spring you could even cut out a section and insert it.

My hinge was 11 1/8 long with the side that mounts to the dash 1 1/4 wide to the hinge pin and the part that mounts to the door 9/16 wide. Note that the holes on the dash side are slotted left to right and the holes on the door side slotted up and down to allow for door adjustment. The torsion springs just assist the door in opening.

I uploaded to photobucket but I am having trouble with their site right now and will add a link later.

Hope this helps Rick