Give Devonia a ring for advice 01364 643355. They can do all sorts of skins as a one-off and are very helpful, but also busy.
For now, get at least a kilo of salt on it, thoroughly rubbing it into any wet patches, even tiny ones, and right out to the edges. Keep it off the ground and dry, hair side down (a pallet on the tilt is quite good).
When you are ready to post it, when it is much dryer and lighter, double or triple wrap in bin bags, but until then let the air get to it.