it is not a compression spring, it is a torsion spring and you make one or buy a factory spring and that is why a posted the parts diagram
the thing about torsion springs is they can be made from smaller diameter wire but getting all the right angles can be a challenge
that spring doesn't look that hard, buy 2 or 3 new springs check the wire size, reduce it 30% and by some wire and try, the worst thing that can happen is you will fail but you can't fail unless you try and it doesn't have to be perfect just has to work
this hobby is more then just shooting, I feel it about learning about your rifles and pistols, fixing them, improving them, caring for them and growing your knowledge and confidence
but I'm a 69 year old man that was washing auto parts for my dad in a cut down 5 gal lacquer can with gasoline in at 7 or 8