Gamo Expomatic, my "Holy Grail" of airguns!

[Dragonslair]

Try one of these - https://www.airrifleheadquarters.com/catalog/item/251488/4452198.htm
They also have a Gamo Express kit, with a stock spring and seals.

 

[OkayShooter]

I have one of those. Need a new spring. I live in Québec. Any suggestion about a source?

https://twchambers.co.uk/airgun-spares/asi/gamo-expomatic-s/

Ive dealt with them for parts before..