Hi Rick,
Since you offered, I have a related request.  My existing Penn Line pantographs are missing some brass?
cross members and fine springs.  The cross pieces  are fine wire strips with a rectangular cross section. Do you or anyone else know who supplies this type of metal stock.  The fine springs are about 1/16" in cross section and around 1/4" in length.  The springs hold the pantographs in the upright position!  If I could rebuild my existing pantographs, I'd be all set and no longer have to search for replacements.
Thanks to you and others reading this thread.
Harveyj

Rick, thanks again for the prompt response.  People like you really make these forums work.  This saves me lots of time and tech support phone calls. 
Harvey

Rick, thank you for the prompt response.  If I read it correctly, the dimensions you are stating are with respect to the pantograph insulators.
Please confirm, when you have the time.
Harveyj

I need the dimensions between the insulators of the HO GG-1 pantographs.  One dimension is parallel to the track.  The other is perpendicular to the track.  My old Penn Line GG-1 measures .8 inches between the pantograph insulators parallel to the track and .7 inches perpendicular to the track. I can't get this information from Bachmann parts in Philadelphia!  Please help me.