Re; Suds-Saver Washers:
Hey! Austin, you can actaully use a Single Laundry-Tub, as long as you get the Special Stand-Pipe, that is opened on both Top and Bottom, with a Plug-Like Stopper that goes into the Laundry-Tub Drain Opening. It has a couple/few slotted openings towards the top of the Pipe, to allow an "Air-Gap" and in case of an Overflow of Water in the Laundry-Tub, it will allow the excess Water to go down the Drain, instead of overflowing the Laundry-Tub. It allows the Wash Water to go into the Laundry-Tub and the Rinse Water goes down the Drain. The Normal Drain Hose of the Washer attaches to the Top of this Standpipe and the Suds "Longer-End" Hose goes over the Side of the Laundry-Tub, to Drain the Wash Water into the Tub. Then when you request Suds-Return, the Longer-End Hose in the Laundry-Tub will Return the Water, minus approx 1/4 inch of Water and the Washer will add that Fresh Water to the Washer, for the following Wash Loads.
Good Luck with your search. I'm not too sure where you might locate that type of Standpipe these days, but I would guess if anyplace might have them, it would be an older Hardware or Plumbing Supply Shop.
Peace, Happy Suds-Return Washing, in the Future, Steve
SactoTeddyBear...