I think sometimes the stuff at IKEA will be hard to retrofit, because they're sized metric or European, and domestic stuff may-not fit. Did you have trouble finding a sink, since I believe that would be the 'fixture' to-which you're referring, or is that the faucet? I suppose if you had an issue finding something that would work, you would have probably mentioned it, so it came-out OK?
My friend just built and sold a luxury spec-home in Durango CO, and has returned to FL. He's in Melbourne now.