I think the question centered around "what", not "where".Try ebay.
you can try the millet LRS-1. they run between 430 and 500. its a big scope...6-25x56, and a 35mm tube! without the sunshade its 18in long. 140 total elevation travel
Although it doesn't show an edit, I quoted you in its entirety. I didn't edit the quote. It originally said "Try ebay". I'm assuming you edited it in that magic window that doesn't show an edit.Finish reading,I posted what I recommended.Both have Target Turrets.