I have boxes of parallel printer cables stacked in the storage building. Let me know if anyone needs any. Standard, and long ones, free, if you pay shipping.
Also, there are plenty of DB25 and DE9 serial cables in various lengths. The same deal, you only pay for shipping, if you can use them. When I get caught up on the 'Computers for Veterans' project, I am going to thin the cable herd, and sell the scrap copper.