Now that you have mentioned specific clients, the msc companies that do that type of shop should not be mentioned in this thread. While MSC A may do Blue Cross in one market, if someone mentions MSC A because in their market Blue Cross is handled by MSC B, there still is the potential for unintended ICA violations.
Around early to mid September the job boards will begin to fill with Medicare opportunities. These are likely to be in the form of seminars and you may be able to do one per client, one per agent or multiples. Advantage plans seem to have the most seminars by far. The seminars and such will continue from about Oct 1 to Dec 7 with actual open enrollment being Oct 15-Dec 7.