The $500 is okay but I am curious why it cost so much more than this one:
700D10896-348 | 700D Series 600V 1000 uF ±10% Metallized Polypropylene Power Ring Film Capacitor | SBE INC - Future Electronics
These are from the same manufacturer, same series and in the same physical package for $200.
Maybe we should ask Future Electronics if they can supply the 1600 uf cap. They might get a better price from SBE because they are a international corp. rather than an individual.
I would like to send an RFQ to Future Electronics and see what they say.