Nothing concrete, no. You could always talk to one of the others if you wanted to combine letters somehow. Send a message in two parts? We don't get a lot of room to write much, but it's enough. Karma split up some messages across letters and told the other side to start connecting them which I'm sure you already knew.

[more importantly...]

Now that they know we're here, you know they'll reach out. [yeah you're not free.]