Losmandy adaptor block set to mount your Astro-Physics rings to
a Losmandy dovetail plate. I couldn't find a Losmandy part number,
but you can log onto their website and look at the mounting plates
for Astro-Physics. The blocks have 4 different sets of holes in
them. I am not sure what other types of rings would adapt to the
hole patterns. I suppose a call to Losmandy would cure that...
New, I have no idea, as I bought the hole plate setup. I would
accept $25.00 and you pay shipping. Reply for a phone number.
Thanks, John H.