Find Target / Particle ID to Vertex ID

[tyFlow]

Hmm, you should be able to use a script operator to assign the proper custom properties.

In your iteration loop (with your target object added to the script operator in the first slot on the list), something like :

tf.SetCustomVector(sInx, "target", obj001.GetVert(sInx));

Then load that vector into the Find Target as the target position.