How to create a "tap" in the middle of an FX chain to send to another track?

Let's say I have an FX chain like this:

Track A
FX1
FX2
FX3
FX4


I want to have a Reverb on Track B, but I want it to come from the audio stream after FX3... So it would look like this

Track A (4 channels)
FX1 (CH1/2)
FX2 (CH1/2)
FX3 (CH1/2)
TAP-SEND to TRACK B (CH3/4)
FX4 (CH1/2)


Track B (receives CH3/4 from Track A)
Reverb

Then Tracks A&B merge again on a buss...

Is there some kind of TAP JS or something I'm not finding that would let me do this and assign.

I know I can do it if the Reverb is IN Track A and just route it's out on 3/4 to a dummy send, but i need the reverb on it's own track.

How to create a "tap" in the middle of an FX chain to send to another track?