This was posted on the Stirton forum back in August, no Idea if they're still available, but it may be worth an email.
Alan
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Posted 26 August 2009 - 11:27 AM
For sale- Knobloch shooting frame. Comes with 40mm lens ring and original adjustable eyeblinder.
Price- £65 including postage.
e-mail- john@johnthompson.freeserve.co.uk for pictures