What Drives Meadowlark Audio Herons

Hi, I have a pair of Meadowlark Audio Heron's, the original, which I am sure uses the same drivers as the Heron-i's. Since Meadowlark is no longer in business, I need to find out what the Drivers specs are on the Herons. I know that they are as follows, but need more details to buy replacement drivers:

Tweeter: 3/4" tweeter from Scan Speak
Mid Range: 4" Audax Aerogel
Woofer: Vifa's 7" premiums

Does anyone know???

Please Help!!!

Thanks in advance.