I have got a few tubes (!), mainly Marzocchi, Ceriani and Betor. CZ are on their way and will be here soon. Typically they are £129 per pair (thats' new, not rechromed used ones)
In the UK CZs can now be used more easily in the championship classes, so CZs are beoming more popular. Big fast 4 strokes can get very expensive. By comparison CZs are rocketships for a fraction of the price, no surprise that there has been increase CZs on the line recently.
The tubes are 2 projects away, so will should hopefully see some by the end of the year.
In the mean time there are excellent people doing excellent work with CZs all of whom can help you.