Thank you for choosing ManageMyLife.com. I understand how important it is to be able to replace your washer with something compatible with the dryer. The original washer that fit on top of this dryer looks like it was 3.1 cubic feet in capacity. It was 2' 6.5" long, 2' 4.8" wide and 3' 3.2" high. The Kenmore washer 02641172000 is 3.6 cubic feet, 2' 7.3" long, 2' 5.5" wide and 3' 7.3" high. It is a little wider than the original. The Frigidaire washer is 3.3 cubic feet, 2' 10" long, 2' 5.1" wide and 3' 5.1" high. So, if you decide to purchase these washers, it looks like it cannot be stacked properly as the washer will stick out from above the dryer.
I recommend looking for the same (or slightly less) dimensions or capacity for the washer that came with the dryer originally. If you have any other units you'd like me to research, please reply to this thread, provide the model numbers, and I would be happy to assist. Thanks for using ManageMyLife.com.