Those parts are easily available at any local home repairing shops in Atlanta. Even the cracks are easy to repair, you need to add welding metals on it.
Why don't you guys use filter on the tap of kitchen sink. The filter has enough water purification feature. You simple need to install it onto the tap.
This is a great thread! I think you have gotten a lot of good advice regarding finding the "integrated kitchen spot" compromise. I agree that spending a lot of time on GW can make you think anything but built in/paneled appliances is low end.