Hello Nige,
I'm actually in the marketing/creative business really, specialising in motorsport and most of our work is in the world of drag racing although not exclusively by any means. Most of our work is in the US but I've been doing quite a lot in middle east recently too. We work with race teams/venues and sponsors and supply everything from a race car paintscheme design to a matching sfi firesuit, handouts/hero cards, crew-shirts and other teamwear, merchandise including diecasts etc etc etc...
http://www.motorsportmarketingsolutions.com is our website if you want to have a look.
With the work being all over the world I don't do any printing in-house, but I have some very good suppliers in various territories and have a good local printer and a great supplier for both screenprinted and embroidered clothing here in the UK. They've both produced some really great quality stuff for me at a really good price. So if the club does need anything, I'm sure both would do us a good deal even on short runs.
The key especially with T-shirts/Shirts is to get the quality right. There's a lot of people doing stuff cheap, but you can really tell its cheap when you put it on and in reality I can usually get the right quality stuff at the same sort of price as these internet suppliers do the cheapo's at. The promo quality T-shirts that most places do for about £9-10 actually come out at about £5 plus shipping to us including a single colour screenprint, even on a fairly short run, but I wouldn't give them away to be honest!
For comparison purposes if you have a look at the shirts on the Corvette Club site that they sell at £35, we can do a very similar shirt for significantly less than that (say around 2/3rd the cost) or a matching two colour Polo shirt for even less, including an embroidered small left breast logo on the front and a 10" logo across the back. With embroidery you really pay per stitch so something big across the back like the Corvette Club shirts does add about £6 to the price. Screenprint is cheaper if you're thinking less colours (preferably 1 colour on a short run) but screenprint is always better on T-shirts whereas embroidery works better on shirts and polos.
Obviously I can get my hands on pretty much anything you'd want to print or embroider the club logo on, so if I can help just drop me a message or something
Mrs Mighty and I share the driving of "Pearl" our 2002 Eurospec Z28. She's black, with the charcoal interior and only covered 25k miles. She's our first Yank and we've had her about 14 months now although the whole buying a yank motor thing was just a long time coming as I've been around drag racing and yanks and rods since I was a kid. I'll put more info up in an introduction thread later...
Mighty