There are some colored flutes which are lacquered available on eBay, but I don't believe they are high quality instruments. I would recommend avoiding them.
There are also some flutes which are made from or plated with gold alloys and can be gold colored. There are some of these which are of very high quality. The solid gold ones would not be appropriate for beginning students, and the plating on plated flutes may wear off, so I would avoid them too. If you have skin allergies to the lip-plate, a gold lip-plate may help.
I recommend sticking with your silver-colored flute .