I've got a USB mouse (MS) that came with a USB to PS/2 converter. It works fine hooked up to a PS/2 port. I run it through a KVM switch that is PS/2 and not USB so this is necessary. One of the boxen ...
As far as mouse bungee systems go, every gaming peripheral maker worth their salt has some sort of offering to match the styling of their mice. Most of the entries I have seen also usually do one ...