If you have a PSP you could downgrade it and run a custome homebrew app that alows you to view PDF files, other wise a couple of companys have things that are kinda like overgrown PDAs and they just run PDF and word files and the like. I have seen one before in a PC magazine but i cant remember the brand name.
A quick look through shop bot or a search on google would probably get you some answers.
The other option is download a program if you have a PDA and view them on that.
Or the easiest option.... Invest in a printer and just print the reports
Anyways if I remember what the device was called I'll post it here.