[dazee]

Mostly I used their cheap entry level ready to run cars to get a cheap chassis from them.

Are these available outside Japan?

You can probably get them shipped via contact on their website http://www.bp-online.net/  The owner is a nice chap and very helpful, I would like to go to their office more but is a fair old drive from here with lovely Tokyo spanning a good portion of the journey.

For a previous slot car website I had got the following information from Banpro with reference to orders from overseas for individuals or stores.  This info is about 2 years old so prices may vary now.

1. 1.　1 x mini cooper, 1 x VW Beetle    [One-piece unit value 30 US dollars ] 

1. 2.　10 x mini cooper, 10 x VW Beetle　 [One-piece unit value 26 US dollars ]  

1. 3.　50 x mini cooper, 50 x VW Beetle  [One-piece unit value 20 US dollars ]