Answers

Aye, wear merino.

This is another possible alternative also.  Not used it myself so can't speak for it's efficacy

www.detoxyourworld.com/acatalog/deo_stone.html

I use Aromaco from Lush which is patchouli based, but they have about half a dozen to choose from. They're organic and cruelty-free and they work.

Try www.lush.co.uk - don't think it's .com. Suitable for vegans and vegetarians too! Never tried them myself, but many deodorants cause me a nasty rash - am OK with Mitchum (the spray) and dove.

BIONSEN is Japanese Spa Minerals, and is from a well known high ST chemist. It is Aluminium free, and is for sensitive skin, you can get it in roll-on and stick Deodorant.