This isn't my business, it's the business of a friend of mine. I can vouch for him though. He sells various car T-shirts but when he mentioned that they just got some rotary style drink coasters in, I thought it may interest some of you.
www.trippytaka.com.au
This business is Australian but can ship overseas..

I am heading to Singapore for a holiday on Monday and meeting up with the Singapore RX8 club there, so I just bought 18 sets of these coasters as gifts for them..