Glad to hear that you got a good deal from US. Also that you managed to improvise on wheels.
On the grass catcher front I had thoughts about leaving mine off/making for sale as it doesn't go through my gates as all bolted up it's just too wide.... I decided just for now to keep hold / refurbish it and then make those gates a tad wider; will bear you in mind though should anything change. Currently trying to get some good advise on fault fixing my Atco B30 cylinder mower with a Tecumseh Engine. This is the only thing I have that does go through the gates and picks up the grass!
Again, have you tried e bay for a drag behind unit that's not PTO driven...have seen some listed in past few months not expensive
Stuart
Stuart....AKA
Beulahcutter
Norfolk
Uk