In reference to your rounded cable needs.... www.svc.com is where I've purchased a couple sets. Less than 15 to connect my Cd drives and 2 hard drives, and floppy drive
it's just the old trick of breaking the ide cables into slits of 5 lines each, then wrapping them up with tape or something, so it's not a wide air flow blocking cable.
In reference to your rounded cable needs.... www.svc.com is where I've purchased a couple sets. Less than 15 to connect my Cd drives and 2 hard drives, and floppy drive