It used to be that all the stackable units were relatively small. However, it seems like most manufacturers now make large size stackable washers & dryers (like those in the photo). The front load washers are also more water and energy efficient. You should be able to find stackable units at most appliance dealers, and I'd guess at Home Depot and Lowes as well.

Thanks!

Absolutely. Numerous brands have large capacity, even commercial grade as well.