At the moment I am not in a position anymore to supply tubes for the Nixie 2 PCB. You can buy the Z5660Ms or Z566Ms online from Jan Wuesten in Germany. His website shows the Z566M as in stock for about 25 Euro each.
The price of a PCB complete with sockets ready to accept the tubes is £60. The PCB without the tubes and without the sockets installed (for use with other types of Nixies) is £55.
All prices mentioned on this page exclude postage. I normally use Royal Mail recorded delivery.
If you are interested, contact Gerard@NixieClock.co.uk
I accept payment in GBP using personal cheques and direct bank transfers. Online payment methods accepted are NOCHEX and PayPal.