How can I, in my VB App, change the source of a remote object at runtime?

For example, I have created Component A. Component A lives as a COM+ object on Servers 1, 2, & 3.

Component A has been exported from all 3 servers.
Client Q (for lack of a better letter), has imported Component A from Server 1. How can I change Client Q to use Server 2 or 3, programmatically?