Can you describe what you mean when you say "they didn't work" ...?
How did they not work? ...did they fall apart? ...did they streak too much?, ...or just plain couldn't get them to fit on the arm?
I don't see why those that you linked wouldn't work.
However, I've always used the Wiper Technologies blades. You can buy them for a few bucks less at RVupgrades (an iRV2 vendor) currently for $27.99. To verify and confirm, here is the Wiper Technologies catalog and you'll see that your Bounder takes the WT6-26,
go HERE for catalog
Go here to buy:
Wiper Technologies WT6-26 Heavy Duty Wiper Blade - 26" -- RVupgrades.com
Some will use cheaper blades on motorhomes with no issues but I've always preferred a little more heavy-duty blades for the motorhomes I've owned. I think it comes from driving transit buses in the PNW where it rains a lot and the OEM blades spec'd for the buses are a nice heavy-duty blade.