Rule auto 1100 gph pump (old stock)

[seadog]

Looking to replace my rear backup pump which is mounted with a side bracket to the bulkhead at about the hight of the main bilge pump. Problem is rule has redesigned the base for this model with a curved base instead of straight base and I can't find a side mount for the new style pump. So I'm trying to find a new pump with the old design. Anyone have any older stock rule 1100 gph auto bilge pump ? The design was changed about a year ago.