I see that Lee Valley are now selling the pairing, cranked-neck and fishtail chisels from Koyamaichi.
At first glance they appear to be about $10 more than what you can buy them for from Stu over @ toolsfromjapan.
LV also appears to only offer the 14 degree (1:4) dovetail angle fishtails and in sizes of 6mm and 12mm as opposed to 9mm and 15mm from TFJ who offer the 1:6, 1:8 and 14 degree dovetail chisels.
Anyway...........