I am sure there is one to download. If google is no help, just ask some deep web specialists, e.g. http://manualfox.com/driver.htm - this is a manual search agency and if they don´t find it, it does not exist in the Internet.
If you want to connect i-mate to your pc and sync your contacts,calendar etc and copy videos and music back and forth all you need is active sync 4.1. Now the weird thing is that my i-mate seems to work only with activesync 4.1 and no other version. The cd that came with my i-mate contains only version 4.0 and it doesnot work with my i-mate. I googled for version 4.1 specifically and got it. Version 4.5 doesn't work either. Now this is just for syncing data. If you want to connect imate to your comp and use it as a modem to connect to the internet you need separate drivers for that. If you need those drivers just email me at samuraix_avinash@rocketmail.com and I will mail it to you. Just remember to use activesync version 4.1 and not any other version.