I just got a "New" MTH CNW E8 ABA from eBay that probably has some type of remote ability
If this is a PS2 or PS3 engine, you can use it with an MTH 50-1033 DCS Remote Commander, as seen by clicking here. You'll still need to operate your other engines conventionally.
It can be used with any transformer and track system, and the list price is $49.95. Click here to see a list of the dealers that have it in stock.
If you decide to get this, drop me an E-mail with your track and transformer, and I'll tell you how to hook it up.