I've heard that in the UK, 'Surgical Spirits' are the same thing as Isopropyl alcohol in the US. I don't know what percentage of iso it contains though.
Outside of that, I might suggest a bottle of Amber-190 or Everclear. I haven't seen Everclear myself, but I know for a fact that I've gotten a bottle of Amber-190 vodka - it's 95% alcohol. I've read on this forum somewhere that it might be bad to put on skin if it's over a certain percentage of alcohol, but here in the US, they sell bottles of 91% iso-alc which I'm quite sure is ok to put on the skin..
If getting Amber-190 I would add some water before putting it on the skin. If adding it in combination with aspirin to make your own 'tend skin', just err on the side of more water.
You may want to check into the actual percentage that's safe for the skin though, as I'm no doctor.

Hope this helps.