I have an old school 40 mm hks waste gate and I need a new spring. Who sells a good knock off or original spring?

 

Hey m8 i couldnt find a spring for my hks unit but i used a red tial one its shorter but stiffer was much better i was at .4bar
With the new spring im at .7 bar
The sizes are completly diffrent i was just gona keep trying till i got right
perfect now i can control 1.5bar with solnoid