Batch of 18 Canvas Stretchers, Mixed Sizes. They Need Re-Canvasing !

I have 18 wooden stretchers that will need re-canvasing, all were good quality when bought, either Windsor or Daler. Sizes range from 70x60cm, 70x50, 50x50, 24x13, 20x16 to some small ones. Also a bag of some card mounts in different sizes that were custom made - 10