I use the Taig 1224ER (or 1224 for 3/4-16 spindle). Works well and is a pretty good deal for $20.00. I'm not immediatly aware of another ER-16 sized fly-cutter but I'm sure they are out there.
I would give a link to the picture of the taig 1224ER on my web-page but I have not had time to get all the accessories back up in the new shopping cart format. They are in stock though.