Hi back Sue
Got my neck pillow from an airport store in the USA, not a memory foam - they were fresh out - but just a foam. Love it to bits. Carry it with me everywhere, and the best of all neck pilloiws that I have ever bought: airplanes, coach, train, car, armchair and settee and of course bed - essential also for the dentist chair! Mavellous also to take when travelling - there is nowt better than one's own pillow

Meant also to comment on loss of height. Phew - 4.25" My old cervical collar is now too high, and the only 'off-the-shelf' one that I can wear is a real soft, filled with miniscule particles that 'mold'. Comfortable, though sometimes could wish for a firmer model - but that would have to be custom made.
Interestingly, had physio and 'Tens' machine on my neck not so long ago. Seemed to work a treat. Even got my voice back! That was after some two years of fighting darn dysphonia. Physiotherapist called me this morning to find out how I was doing, was pleased to tell her that the Tens really seemed to help. Would be interesting to get some studies on that aspect. Anyways, went out and bought my own Tens machine. Trouble is, trying to get the pads to the 'right' placement. Need another set of hands to help me out... (Needless to say, sans the Tens treatment dysphonia back, spasmodic.)
Molly
Keeping on Keeping on