To the best of my knowledge there is nothing you can do with CompactLogix. You may have an opportunity with ControlLogix using a 1756-M08SEG (I think that number is right). However, AB won't just unconditionally release this module. You need to show them that there is no alternative in the AB family or come up with some 'good' reason why you can't stay all AB. The M08SEG also does some funny things at module start with writing to some parameters you wouldn't necessarily expect.
We are currently linvolved with a project using several M08SEG with Indramat drives. It does work as far as we can see. However, we have a pretty simple web control application so I don't know how capable the combination really is.
Keith