Anyone knows of a Mark I printer that is up for sale and could serve as a donor?

My Mark I printer is beginning to show signs of aging, and I'm keen on giving it a refresh to keep it running smoothly. However, I'm facing the challenge that many parts are no longer available for this model. As a solution, I'm thinking of finding a donor machine, combining it with mine, and creating one fully functional printer. If anyone knows of a Mark I printer that is up for sale and could serve as a donor, I would greatly appreciate the lead. I understand this might be a bit of a crazy idea, but I'm eager to give it a try and keep my printer going.