Newt,
I have an L210 also and I am debating if it is worth restoring. I need a starter and a variety of small parts.I'll let you know if I find a parts source.
Looked at this tractor recently. Front end loader, turf tires, 900 hrs(?)Tractor smoked on startup, visible blowby. Engine sound good, everything works. They are asking $3800. Is this reasonable for a tractor in this condition?