Need help with finding return and refund for Stepper Motor, Is US distributor?

1st part: Our school order a Stepper Motor thinking it would upgrade a UArm Swift,(not the pro)
need to ship back and get refund to my small budget from the school. $79.00 is a lot.
2nd part : Please, any one know a US distributor or where I can order a main control board for a UArm Swift Pro? The board for one of our UArm Swift Pro is cracked.

Thanks for any help.

Official Store
uArm User Facebook Group

English Channel

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