Is there any chance to get the S9 parts with the original seller or on amazon/ebay ?
well first you need to know if the batch your miner came from was before the auto tune firmware or after. the next thing is to find out if its a post t9 miner or a pre t9 miner. either way im sure you wont have much luck finding a spare controller on ebay or amazon...your better off emailing bitmain about getting a replacement...they arent too expensive i dont think. the only way people are selling spare parts is if a miner broke and they wanna make money off the pieces that still function properly. since most s9's are still under warranty or are running fine chances are no one has had to scrap their s9 for whatever little bit of money it can get on the secondary market. you can try but why waste the time and effort? just email them and get info on a replacement controller.
Hopefully when they release a new batch the quality control will be better.