Jon9999,
I'm fairly sure this can be done using two OBi110's - I know you already have one, so that should keep costs down.
The method will involve yet another version of a master/slave setup. To work reliably both OBi110's will need to be in the same subnet behind the same router. Passing CallerID via the AA routed calls may be an issue. That would have to be tested.
If you are willing to buy another OBi110 and be "Chief Tester", then I'm willing to have a go at the configuration.
Edit: sp2 needs to be spare on both OBi110's. That's how we will link them together.