I was able to get a response from the Bank Of Canada.
"In response to your inquiry, the 1954 $1,000 with the signatures of Governor Crow and Deputy-Governor Thiessen indeed had a limited print run. Due to a low demand for the note, the $1,000 was not redesigned for the Scenes of Canada series and printing of the 1954 series $1,000 continued until the Birds series was put into circulation. As mentioned in the catalogues most of the 1954 Thiessen/Crown $1,000 notes were destroyed. Just how many notes have survived is not known. The Bank of Canada does not record serial numbers when notes are destroyed therefore it is impossible to determine how many of a particular series let alone a specific signature combination have been destroyed. Furthermore, to my knowledge there is no registry to determine the existing population of the 1954 Thiessen/Crow $1,000. The Canadian Paper Money Society publishes registries of rare and scarce Canadian bank notes. You may want to contact the organization to see if a registry exists for the note. "
It echoes JB-2007's comments previously. Does anybody know if the Canadian Paper Money Society has published a registry on this? What about the note grading companies, do they publish a record of all of the notes they have graded?
Thanks Starman!