This seems like a simple stupid question but I can't find a sink stopper that fits my 2018 Forest River Wildcat T251RBQ. We just bought it used. Stoppers were tossed I guess. I bought the round flat rubber deal that mostly works. I would like to have the correct stoppers for the double kitchen sink though. I searched the sink and drains for a brand / model - nothing. Local hardware store, tried 2 different styles. Neither would fit all the way down. Anyone know the brand Forest River uses? Thanks! Mike