It's certainly worth a try, but I doubt they will wear it. It doesn't seem to be the done thing these days.
Garages are quite happy to replace singly, and the MOT tester doesn't care if one is 20 years old and one is 20 minutes, so long as they both function as intended.
Personally, I like to replace in pairs, but you use some common sense - if one fails and they are both 10+ years old, you replace both. You can certainly feel the difference between a new and old shocker, but it's negligible once the new one is bedded in.