Wrist bands
I had a Bulldog student who felt unwell during aeros, his or mine! I bought a set of wrist bands and let him try them. They certainly seemed to lengthen the period of time before he felt unwell, by quite a lot. It maybe that he expected them to work so they appeared to = psychsomatic. They are cheap enough to try. Allegedly a similar effect can be achieved by putting a coffee bean or a small peanut in one's watch strap on the inner wrist. Might mean wearing 2 watches though! I'll go along with keep the cockpit cool and look out as much as possible!