Another day of searching revealed some potential winners here.
No formal endorsements but I can tell you that these companies all responded to my inquiries in a timely fashion, less than 10 mins, and indicate some form of unlimited ISP offer.

Each also provided a personal follow-up to my follow-up...(in English)
No recommendations here yet, BUT to various degrees these companies seemed to be working from a real world service frame-of-reference.

I culled them from the The Belgian National Internet eXchange master list I found this morning:

www.bnix.net/members.php

Here they are:

www.edpnetmobile.be
www.mactelecom.com
www.talessa.com

Talessa, the last one, got extra attention with blazing fast web site and a CRM (Customer Relationship Management ) number to track and reference my status.

on the down side: The ISP provider Scarlet provides an sales inquiry e-mail address that didn't work.