--something along the line of a TENS unit or similar electrostimulation device?

Some people do get significant relief from sensory symptoms with these, but it seems to be very hit or miss. The tingling induced by such devices helps to mask and/or block other abnormal sensations.

I have such a unit, but I've found the salutary effects only occur when I am using it; as soon as the power shuts down other sensory symptoms return.