I have a Palmgren milling attachment,Model 250 ( also sometimes called a "vertical slide") in excellent condition for sale. It looks like a vise mounted on a z-axis track and can be adjusted vertically to .001" to place your work piece at the correct position for milling on the lathe. It fits a 9 to 12 inch lathe.
Only used a few times on my SB10K lathe before I got a mill/drill. I would like to get $130. US for it. If interested, email me at pmerriam "at" accesscable.net and I can send you some photos. I am located in Nova Scotia, Canada.