I have a bally or stern 26-1200 - used and dirty but working ok.
I have a new unused Williams 26 - 1400 ….. so slightly weaker but prob do the job
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There's a 26-1200 incorrectly used on your Diner, for the cup diverter. It's listed as a 1200, but a later correction to the printed material says it should be a 26-1500. Source one of those, and use the existing 1200.