Can anyone recommend brand and availability for a self propelled, walk behind mower with 16" or so bicycle type rear wheels, 22-24 inch blade? They are hard to find retail here. I located a web site for Sarlo mowers and am interested but wondered if there were others, maybe commercial lines I am not aware of. I need a decent sized trim mower for my yard with many heavily rooted trees that regular push mowers cannot handle plus all the shrubs, etc. My current one is a Johnson Big Wheel with a 9 hp tech motor. They went out of business and the main seal needs replacing, deck rot, etc. I know the prices can ruin a $1000 but it's what I need for this big country yard I keep up. All help appreciated!