Speak to Noor at Torenno. He should do you a decent deal.
They seem rare on ebay Dave. In fact I cannot recall seeing the valved ones on there before.
I searched and found some new ones, but £1900. I was thinking more around the £1200 mark.
Am I kidding myself!!
At £1200 I'd almost (almost) be tempted to sell mine... although mine aren't valved.