Hmm I think I disagree (sorry jneiberger).
If you order a AIM-ATM-4T1, what you get is a kit that includes:
AIM-ATM (the AIM card)
and
2*VWIC-2MFT-T1 (the interfaces)
So if you already have the AIM card, you could feasibly use your existing VWIC-2MFT-T1, bond them and create the 3mb pipe you're looking for.