I think if this was going to be done properly, the bracket would be modified to accommodate the front facing support threads and rubber bushing in the AHC pump. In my mind that would look like a bump on the top of the support bracket with a hole to accept the bushing. You can see the front mount unsupported in this picture relative to the bracket. I had to mill a small amount for the pump to clear.
View attachment 3987234
Agreed that it would be ideal to have an integral support.
I made a quick and dirty solution using a stainless steel cushion clamp. I should have checked before mounting but I believe it's a 1" clamp. In retrospect, I should have left it as a P style clamp using one hole instead. And should have spent the time to thread and bolt but I'm also trying to make it to a trip this wekeend.