Hi Western and Amy,
It is a good question. Try contacting Bikeman at Flying Ball
http://www.flyingball.com/ He attends the Dragons races. At the risk of promoting another club's website, Sonic has a forum on this topic that is better patronized that the Dragon's one at the moment.

You may find what you are looking for on it
http://www.sonicsports.org.hk/forum Finally, Amy, you have given your size so I know I can't help you but Western, you have not given your height. I have a large, 60 cm bike that is well out of date. It has the old Suntour shifters on the frame rather than the handlebars. Apart from that, it is tri-equipped with profile bars and look pedals and it rides well. If you are interested, I could only charge $700 for it. Give me a call on 91705605 and you could be the proud owner!
Good Luck
Paul