This was my list from before:
Duck tape
cable ties
spanner
angled grips/wrench
screwdriver
snippers
jump leads
spare fuses
spare bulbs
torch
roll of blue roll and a sponge (for bailing out water from leaks)
jubilee clips
a bit of 22mm copper pipe
fire extinguisher
bottle of whisky (to start a fire)
50 litres of water
wet 'n dry / sandpaper
roll of wire
socket to get a spark plug out
foot pump
RPM relay (or knowledge of how to bypass it and the thing to do that)
couple of spark plugs maybe
fuel pump*
otterstat (or knowledge of how to bypass it and the thing to do that)
fan belt(s)
spare clutch fluid
*a non-collapsible pickup hose should eliminate the need for this though.
Shipping to a business address now in the EU adds an extra layer of complication in certain countries, even for Ed, but yes, generally it's still possible to ship something pretty fast, assuming both me and Ed are also not away ...