it seems the Spektrum TM1000 full range telemetry trasmitter is discontinued and it won't be replaced with a new one.
This because the Spektrum are moving to integrate the telemetry trasmitter inside the receiver.
Therefore, the receiver will be a must to trasmit telemetry data.
Hovewer, the X-bus is still available on new receivers.
New Spektrum controlled model won't be able anymore to use telemetry Mercury telemetry data.
Maybe satellites must be connected to the Spektrum receiver.
I have two models and two TM-1000 but I suggest you that it is a good time to revise the unit Spektrum compatibility design...
Hope to have news about that.