It's funny when I see people mention talking to TLR, or Spektrum, or Arrma as if they are a separate entity from Horizon
And let's analyze their response. They have a company that can produce and supply parts for for the X, but they can't produce parts for the 5.0?
Those older 5.0 parts must have been made with a material that was excreted from the pores of the owner of that previous supplier, and he is the only person on the planet that excretes that particular plastic, and Horizon isn't smart enough to figure out people don't really excrete plastic, and the previous company was simply preying on their gullibility to make more money

It's crazy huh? Not as crazy as this...
I contacted "Spektrum" needing dimensions of one of their servos. This was their response...
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Keep in mind. I emailed this from Spektrum's website. The reply as you see came from Horizon. I won't share my reply, but basically I said "Wait, you own Spektrum. So you are Spektrum. So you designed the servo. But you can't give yourself the dimensions of the servo you designed, because you're not in the office?"