The tubing should be available anywhere that sells water cooling supplies. I've had friends use www.frozencpu.com
in the past, and been very happy with the service; you're looking for tubes with a 10-14mm outside diameter and 8-11mm inside diameter (with a 1-2mm wall thickness).
The power cord is going to be a lot trickier, though, because it looks like a custom job. I just love it when companies do something like that, because your choices are to contact Zalman for a replacement or get really lucky at some online shop. If that doesn't work, you could try to find the appropriate connector and make your own cord, and if all else fails you can convert the plug to something more readily available (barrel plug if it's low-voltage DC, IEC socket if it's mains-powered).