Yeah, Mountune US will not encaurage you to get parts from Mountune UK.Interesting, I emailed mountune usa to get the v2 breather plate and they replied with they don't carry that part, and then recommend the v1 breather plate.
Maybe I needed to word my ask different.. Either way, you would think if providing part number they would mention they could get it from UK mountune..🤷♂️
If you reach out to Mountune UK and tell them that you cannot get the part from their US counterpart they might work with you.
That's what I did.
Worst case use a mail forwarder or a reseller.