Is there a method on the customer object that I can feed an address

{ ... }

to and get back the internalid if it already exists?

Nope. You'll have to implement this.

No worries. Not a big deal, just didn't wanna re-invent the wheel. Thanks!

yup it should be a simple findWhere on the address collection!

ModelsInit.customer.getAddressBook()

Yep, I implemented the search I needed yesterday. I did use the addressBook method. Thanks!!