I'll see if ammoman has any in stock.
As for the Czech, it's fine if you don't mind corrosive ammo. I've got some Hungarian yellow-tip heavy (174gr.) ball surplus and some Polish silver-tip light (147gr.) ball surplus but both are corrosive and I only shoot them out of my M44 Mosin Nagant, which is very easy to keep clean and looking like new. I need the non-corrosive for my PSL. I don't want the inside of my gas cylinder, the piston, the underside of the rear sight or any other part exposed to the corrosive salts to get rusty, nor do I feel like cleaning out every nook and cranny to keep rust at bay.
A lot of people shoot corrosive ammo out of their PSL, but I had one of the low-grade well-used Yugo M59/66 SKSs. It's barrel looked so rough it looked like it was made from sand-cast iron. And the piston, gas cylinder, 'push rod', 'push rod' spring, and every other exposed-to-gas parts were rusty and deeply pitted. The outside of the gun and the innards of the receiver were perfect. I'm sure all it had shot was corrosive ammo, and I'd like to keep my PSL from even thinking about going down that track!