Centurylink won's provide an ISDN BRI - but they will resell it to a CLEC [telecom]

I've been checking on the availability of BRI (Basic Rate Interface) ISDN lines, to find where they are still available.

I as surprised when I came across a Centurylink publication which I think allows an end-run around their tariff: they will aparently allow end-users to order a BRI from a CLEC, and have Centurylink provide it.