I don’t recall seeing mention of Cherry making one, she tended to go more for self propelled subjects rather than one that was pulled along and too much wood in it for her.
There is mention of one by John Haining in an old model engineer but not one of his published designs as far as I know. If anyone has ME 3888 Vol 166 of 1991 they might post an image from the Ursk show.
The Guild of Model Wheelwrights is no more but that would be a place to look as I’m sure I have seen seed drills on their displays