To find a complete 1045 movement will be a hard nut, mainly because it was also used in the Holy Grail...
The parts are hard to find and got quite expensive, and putting together a movement in buying parts will be rather expensive.
I would have some spare parts I didn' t use for the restoration left, if you will start with the project.
The band as well the Swiss as the Mexican version a very hard to find and quite expensive too.
With a little patience and some luck everything could be found though.