For those in the USofA, you can also buy the correct Honda / RS Sumitomo connectors from:

http://www.cycleterminal.com/hw-series-090.html

For those in the UK, you can buy the correct Honda / RS Sumitomo connectors from:

http://www.automotiveconnectors.com/housings.html

I have not been able to find any of the 3 or 4 pin orange Sumitomo connectors yet.