Roper and GE?
Roper RTW4516FW2 has a dual agitator, but it is vertical modular washer. This is also one of the lower priced ones. Someone on this board has one though, and he likes it a lot. I am not sure about the durability of it. People do not feel this design will hold up as well.
My Maytag vmwp575gw is also a vertical modular washer. However, the critical parts have been reinforced. Even so, I do not expect the washer to last more than ten years, but it is number 1 when it comes to cleaning performance and easy for me to repair. With that said, the Speed Queen TC5 seems to be the undisputed top favorite (and my overall favorite too) will likely require fewer repairs and last longer before major repairs are needed vs. the Maytag. However, it costs more too.
The Maytag has a five year parts and labor warranty (this is all the time) and the Speed Queen has a 10-year parts and labor warranty for a limited time only if purchased and installed before end of year. Otherwise, warranty is three years for that model. I am not sure if the same offer is good in Canada. I know you are having issues with locating a retailer anyway. Both of these washers are expensive where you live, the warranty offers additional peace of mind. This is the only reason I mention it.
General Electric also makes some top loads with the dual agitator. I tried to find the ones that are NOT HE. However, HE ones that have deep fill may work too. I have seen somewhere where one or some of their models may come with a direct drive now? If so, this may give it an edge over the Maytag washer. However, they would cost me about the same as the Maytag washer where I live.
I have been mostly looking at the knob versions. I like that some of these models still have the water level selector switch. What I don't like is the dial (the large white one) to select the cycle on the washer or dryer. They do not seem well made. The smaller knobs seem okay. I help someone do their laundry that has a GE machine.
They weigh 150 lbs. or more, so not a lightweight machine. This is similar to weight of Maytag.
I found these, but I cannot tell if they are direct drive or not. I cannot see the details of the parts diagrams well enough but I don't see a typical belt guard like what comes with vmw washers.
Is this one of their direct drive models? Look at the parts list for it?
https://www.geapplianceparts.com/store/parts/ModelSectionParts/GTW725BSN0WS/3/0/0/0/TUB_&_MOTOR
What about this one?
https://www.geapplianceparts.com/store/parts/ModelSectionParts/GTW845CSN0WS/3/0/0/0/TUB_&_MOTOR