I found this flip key shell for the euro on ebay.

http://cgi.ebay.com.au/HONDA-3-BUTTO...QQcmdZViewItem

It arrived on thursday, the plastic feels a bit thin and it doesn't feel as solid as the standard euro keys. But its the easiest flip key mod for the euro.

Just take the immobiliser out of the standard shell and place it in this one.

A warning though, take care when you open it and make sure you spin the spring the right way when you open it to swap the immobiliser piece over.

I spun it the wrong way and almost busted the spring.