There is a McGee flute currently on Ebay. Here’s their pic:
It has a thinned head, but I’ve never seen a slide/barrel like this one (Naked!).
Here’s a link to the auction: http://cgi.ebay.com/Terry-McGee-keyless-Irish-Flute_W0QQitemZ7412359097QQcategoryZ47102QQrdZ1QQcmdZViewItem