There are usually a lot of Flybacks on ebay, you will need to know the part numb
er though.
http://www.ebay.com/sch/i.html?_odkw...watch&_sacat=0
Also you might try Moyer Electronics, they have a big supply of NOS parts.
http://www.moyerelectronics.com/
You will have to e-mail them with your model number so they can look it up and search their stock.