Manual won't come up for me - Can the drives be configurted for Step & Direction?
The newer Yaskawa Sigma series can be setup for Analog or Step&Direction. Omron sells a repackaged version of the Yaskawa drive that they call SmartStep that are stepper input only. I have also used Mitsubuishi drives that were step & Direction, but I preferred the Omron/Yaskawa drives. If you have the money one of these options might be easier to work with and you can get a local vendor to give you some assistance, depending on your level of electronics experience. It might cost a little more but you do buy access to their experience which might be what makes or breaks your project or your time frame for operation..
There are others out there - Automation Direct and others but I have zero experience with them.