Wanted 7 speed shimano shifter cover

[Becontreejim]

I have a missing shifter cover on a 7 speed Shimano exage equipped diamondback ascent. Not familiar with mtb or shimano. I have included pics of the missing item and the left hand cover which is present. Any tips where to locate, model or if you have a spare, much appreciated. Bike is circa 1992.

 

[hamster]

That’s a much later shifter, 2000s.

 

[Becontreejim]

Thanks for that, advice appreciated. I don't suppose you know the model so I can try and track down a replacement. Knowing what I am looking for will help ebay searches etc. Thank you.