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I paid CAD$5 for a right angled MiniUSB cable on Amazon, and it's one of the better purchases I've made. Now I can practice in the simulator with the radio held the way I hold it when I'm actually flying, which improves the overall experience. If you have a QX7 and use simulators, I can't suggest this strongly enough. This keeps the USB cable from digging into my waist, and reduces strain on the radio's USB port.
(Note: NOT an affiliate link, I'm just a happy customer.)
You're getting some pretty bad responses here. Check out the wiki for USB Connector types. This is a USB Mini-B. Any standard USB Mini-B cable should fit. Here is one on Amazon for $3 with free Amazon Prime Same Day shipping.
Edit: Did Amazon change their free-same-day policy? Looks like you have to have a cart total over $35 to qualify for free-same-day now :(. I've ordered dozens of things free-same-day that definitely did not qualify, so pretty sure they just changed their policy :(.
I have this one coming - the one I'm using is straight. Don't like it sticking out. https://smile.amazon.com/gp/product/B004W8EIMW/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 Any new cable like this should work. Mine first one was about 10 years old.
StarTech Mini USB Cable - A to Right Angle Mini B - 3 Feet