This week I took delivery of a small batch of these from http://deloreans.co.uk/product/doc-uk-e ... n-t-shirt/
A nice T shirt, printed under licence from Haynes themselves - as worn by Alistair himself at the last meet-up. Years ago I know Maria did a batch of something similar, but this uses a different drawing.
I have a few - if anyone who is going to OctoberTec is interested in one, I may be able to help. Let me know and I'll bring them along. You can also find them on Ebay.
They are available in blue and green.