Town post is prolly your best bet. I deal lots with a local gun smith... he usually has a decent selection at good prices and have bought several rifles from him. You could check for that too.
We make them ourselves. 3/8” square for the Gripper skis. Bend, weld the studs to em and weld a “wear” strip where the carbide usually is. Worked really well so far.
We have an older Gas water wacker and a newer gas kärcher unit. The Kärcher justs sits around. Although the karcher has 2hp more the water wacker has more power. (Same tip)