I have recently noticed that these keirin race jerseys appear quite often at the Japanese auction site, some with the matching helmet covers. Here are some examples. Most of the people offering these don't sell internationally, but I could possibly pick them up if anyone is interested. I bet they would make people 'swoon' in Kansas. All kinds of Keirin related goods come up. It's a big time business over here. Here are some examples. No relation to the sellers.
http://page2.auctions.yahoo.co.jp/
Contact me off list if anyone is interested in the jerseys. It may be too late to pick up the ones shown here, but there will be more available in the future. Some, if not possibly most, are new it seems. I can watch to see what prices they tend to go for, and the sizes. if there is enough interest, I might try and purchase them to re-offer when I have some quantity, and can then be more precise about the description.
Dennis Young
Hotaka, Japan