Long ago and far away
The 077107-shaft seal disappeared from Hobart shelves decades ago. It was used on Hobarts "UM" series dishwashers as well as the larger sized KD dishwashers. The UM series ended production around 1979 give or take. And you KDS14 ended in 1963-64 and was replaced by the KD15 series machines.
It was a John Crane seal and the closest I can get to their stock number is a T-64 seal.
You may want to search for it under that stock number.
It's going to be a shame to trash such a good machine because of a shaft seal issue.
Good luck.