There are a couple that are continually available from an infamous retailer on a well-known internet auction site at crazy stratospheric prices. I've never come across a sensibly-priced one.
I also was trying to find someone who used it (Tele-Dynar 25,5cm) with Bergheil 9x12 but did not. Indeed the prices are very high. I would like to see photo examples Tele-Dynar produces. Wonder how it does in b&w landscape.