I'm not sure this will help you but this is my work-around.  I'll explain with an example or two.

First example:  My client has a boatload of credit cards, most of which are VISA cards with one with the Bank of America, one with Wells Fargo, another one with Citibank, etc., etc., etc. --- you get the idea. 

So in my Vendor list, instead of setting that up as "Bank of America VISA" and "Wells Fargo Visa" or "Citibank Visa" ---- instead (since I want all his credit cards grouped together), I set up those cards in my Vendor list like this:

VISA -234/Bank of America

VISA-3382/Wells Fargo

VISA-8890/Citbank

This way they are all grouped together so i can tell which credit card needs a bit more attention than the other --- but all in one place.

Here's another example:  Taxes!  My client has multiple jurisdictions he needs to pay taxes to and I don't want to have to go up and down/back and forth looking for all of them.  So I will set them up in my vendor list as:

TAXES/Georgia SUI

TAXES/Georgia EE W/Holding

TAXES/Kentucky SUI

TAXES/Kentucky EE W/Holding

TAXES/New York SUI

TAXES/New York SUI

You get the idea. 

So the goal is to get all of these bunched together even if they aren't as you hope (Vendor parent with a Vendor sub like you can do with Customers and jobs).

Hope that kinda/sorta helps?

Cheers

(: