You might want to check with Smart Designs (Digital Art Solutions). They took over the US distribution of FontExpert from my company which is published by the same German company that distributes Serials. The last upgrade to FontExpert was bundled with the Serials Type Collection. They may have some still available or offer it separately.
In honesty, I frankly don't recommend the collection. The technicals of it leave much to be desired. The collection has been floating around for somewhere in the ten to fifteen year range. It was developed by a guy named Brendal and he had a rather strange approach:
Let's take a popular font and recreate it (clone it) at seven different weights ... none of which match the existing popular versions.
What you end up with is Helvetica Kinda Medium and Futura Sorta Bold. You get the idea. They are almost useless for recreating anything anyone brings you and the quality is so dismal, you won't be pleased. If you're looking for a good quality core collection, buy CorelDRAW and take advantage of the approximate 1,000 good fonts that are bundled with that application.