While looking for info on British and Canadian Pontoons, I noticed IWM has quite a selection of pictures.....I don't know if these are recently added to the site, or if I just missed them before, but I am attaching a few.
source:
https://www.iwm.org.uk/collections/search
I am specifically looking for measurements and/or scale plans of MkV and MkVI pontoons.....or any info on possible survivors. If anyone knows of any drawings, please let me know. Post-war nato pontoons seem to be a dime a dozen here, but I can't remember seeing any WW2 Commonwealth pontoons.