Unless you have a thumbdrive, at which point the live distro should happily nest itself on there. The upside of that is you can take your whole setup anywhere with just the disk and thumbdrive, and use it in any computer.
If there's like an OEM or something near you, check there for old used notebook keyboards. Notebook HDDs, though, are available just about anywhere. Bust Buy, CompUSA, Office Max, etc.
(An OEM-time store should have screens as well. Or an entire new case, complete with keyboard and screen.)
(In case I make no damn sense, OEM is this store I've been to that sells just about anything electrical or other weird stuff. Those big red emergency shutoff switches, little flip switches, individual components, transformer parts, things that I don't know what the fuck they are, hydraulic/pneumatic rams, etc. It's like Radio Shack on steroids. And less clean.)