Those double adapters are large but nice, I used to have one. My daughter is now using an AEK2 with my adapter, so I should get another one. They are good to have around.
Be patient and the "standard" iMates turn up regularly on ebay in the $20-25 range, don't pay much more than that unless you are in a hurry.
That looks like a very nice AEK2, usually they are very yellowed.