Please see the AP website for this. They are $45. I bought it and then wound up not needing it, so it is brand new. This will add 3.6" of out travel; just slides into your 2" focuser like any 2" eyepiece would. Female end has brass compression ring so that it will not mar your eyepieces. - $30 shipped to anywhere in the USA. Please pay by PayPal.
Thanks for looking, and have a great day!