Home made.
I am lucky to be very near a neon sign maker's shop. I get pieces of glass tubing from him for next to nothing. I take two tubes and glue them together with epoxy. One serves at the pusher, the other as the handle. Works like a charm and they cheap as borsch.
Same as Craig - homemade. Soda-glass rods (come in a lot of diameters from very small to very large from ladware vendors, even occasionally in Ebay) bend easy with a plumbers gas-jet. Don't get the tempered/pyrex variety, though - needs more hat than an ordinary blowlamp can supply.