Richie,
For interest, here are links to the two weasel aftermarket track manufacturers.
https://www.facebook.com/LibertyAutoRestoration/
http://www.staman.nl/
If you were to decide to restore a weasel and fit Staman tracks, could I suggest that you ring Tony at Axholm signs and gauge his opinion on both owning a weasel and the rubber track system. I don't think Liberty are making their tracks nowadays, but if they were, you would need to take a second mortgage out on your house to pay for them and the shipping from the USA to UK. As an example, back in 2013 my LAR tracks cost $9500USD plus shipping. Good luck with your final vehicle choice although as an added incentive, weasels do float if you are nautically inclined
. Just out of interest, will a carrier float without added buoyancy?
Cheers
John W.