Rotsa Ruck! I went crazy trying to get springs for that gun and finally ended up making them. The first was tough because I had only a picture and no model, but later I made a few more and they worked OK.
One problem is that apparently they were made in the days of copper cases and even with like-new guns it is iffy if they will fire the modern hard brass cases.
Jim
P.S. Gun Parts lists some parts but not the springs; before you go nuts trying to find it, they have it listed under "H" for Henry M. Kolb, the original maker, rather than Sedgley.
JEK