Sources for semi-custom HSS slitting saws?

I have a job coming up where I need a 4" diameter saw, 0.035-0.036" wide, to cut a notch 1" deep in the edge of 0.5" thick 1018. At the moment, I'm looking at 72 teeth and alternate tooth chamfer. Because my feed control for this operation is less than ideal, I'm looking for HSS rather than carbide saws.

I can find lots of suppliers for semi-custom carbide slitting saws, but since Thurston is gone, not so many for HSS. I have an inquiry in to Martindale/Gaylee already. Looking for additional sources for semi-custom HSS slitting saws up to 4" diameter.

Speaking of Thurston, I have a stack 3 to 4" tall of Thurston HSS slitting saws ranging from 0.009 to 0.064". Most of them 2.75" diameter. Shudder to think what the replacement cost today would be.

We do specials all the time. Current delivery is 3-4 weeks. This is a stock item. See if it works for you. If not email us and I will give you a formal quote on exactly what you need. If you can buy min 3 pcs price will be the same as this saw. @$166 each. Solid carbide with staggered tooth.

Solid Carbide Slitting Saw 4.0 X 1.0 X .040 Thick 72 teeth Staggered MariTool