shift pattern plaque for dash?

Last summer we purchased a '88 Pete 377. It is a 13 speed, but there is not a shift pattern indicator on the dash, floor, etc. Once I get in and drive it for awhile, I can remember where the gears are. We also have a 1994 Pete 377 which is a 10 speed. It would be easier for new people(namely my brother, who is just learning) to learn how to shift, and which gear they are in, if there was one of the indicators he could glance at, in case he needed. Do you folks know where I could find the appropriate plaque? I could always just use magic marker and mark it on the dash, but the plaque would look much nicer!

thanks,
coadman

 

Thanks, I spend a lot of time on Ebay, never thought to look for one of these, but it was there!
coadman