I have here is a really nice Walkera Transmitter with a RX1202 Reciever.. Now I do know that it's a popular upgrade, because when you update the firmware you can use any receiver like JR, Specktrum, and Futaba and others... There's lot's on videos on YouTube as to how to do it (It's pretty easy).. But I can put the files on a CD for you.
However PLEASE don't ask me how to do it, as I've never done that. Just look for Walkera dev 10 firmware update on YouTube for all the info.. Plus the TX is not binded yet to the Walkera Receiver, and I'll include the original RF modual too. The antenna is upgraded too.
Now you can unscrew it to change it if needed, and I'll include the Walkera USB cable too to connect the transmitter to your PC. This item is in the category "Toys & Hobbies\Radio Control & Control Line\RC Model Vehicle Parts & Accs\Control, Radio & Electronics\Receivers & Transmitters". The seller is "hooleydogmarmite" and is located in this country: US. This item can be shipped to United States.