I have the same exact skimmer. I’ve been looking for a pump for mine because every time I turn the skimmer off the pump gives me a hard time when I turn it back on. Have you had any of these issues with the pump on your skimmer?
I’ve had a few of these skimmers over the years. Bought them all used and eventually replaced the impeller in all of them. Don’t think I’ve ever had a block go out. Might try replacing the impeller if you can still get one.