I have just updated the website with full text searchable PDFs. This means that you can search for text within the manual like you would with a normal document. You can also to a limited extent copy and paste the text out of the PDF. (Because of this even if you have a printed copy of the manuals it is worth downloading.)
See the website at
http://www.kenbakkit.com/manuals.html
The entire printed manual is available for download. Let me know if you find them useful!