yes you can!
Search for barebooks and find yourself a nice and good shell for your new pc and then browse the interweps for parts for this barebook. I would try ebay first.
but, YES it is possible but you need to spend some time researching online.
I am currently using an old Microsoft keyboard, Steel series mousepad, and an Logitech MX performance.
The Logitech is for loan so i could really use some nice products from Feenix
// Simon
until