In Australia we have PCCaseGear and MWave. (And a bunch of others but I tend to just compare those two)
Plus we've got our own local version of https://au.pcpartpicker.com/ though I've had mixed success with that the past few years. Supply chains are still really screwy domestically.
There's a bunch of highly dubious vendors in AU, no one quite knows how they stay in business. Best bet is to search whirlpool.net.au for horror stories if you're about to make your first transaction with a new vendor.
After threatening them with the ACCC (and CC'ing the ACCC IN the email to prove I was serious) they "generously" offered to send the CPU back to AMD to be "repaired"