bbrimacombe: I was in the area today so I decided to pick up the cache container and archive the cache. Thanks to all 38 finders and anyone who attempted to solve this puzzle over the last 11+ years.
Here's the solution: The restaurant that was located at 67 rue Wellington in Hull had previously been a hardware store until August 1995 (https://www.historymuseum.ca/cmc/exhibitions/hist/hull/rw_65_ie.html). Luke's Diner on Gilmore Girls had also been a hardware store that Luke's father ran until Luke turned it into a diner (https://screenrant.com/gilmore-girls-lukes-diner-easter-eggs/). I love learning about the history of Hull and when I discovered that the history of this building was similar to that of Luke's Diner, I thought it was perfect for a geocaching puzzle.
I've included a few google street view images of the building over the years. The last available image is from May 2021.