stu,
If I needed the G&H mount I would buy it directly from USA but would have it installed locally -see my location- by my Ferlach trained gunsmith. (Main reason is shipping a rifle from Europe to USA and back is complicated and quite costly). Recently he made me claw mounts for a prewar Merkel for $600 - less than 1/2 of what Frankonia charges. I can recommend him highly and comparing to NJ he is almost your neighbour.
With kind regards,
Jani