neck support/collar for head drop

Hi All,

I am loving this forum, just discovered it recently!
I am looking for recommendations for a good neck support for head drop. My partner cannot hold his own head very often and it drops forwards and to one side (laterally). We have been searching for a suitable neck support or collar that keeps the head up and chin tucked as well as offers lateral support, so his head doesn't tip in one direction. Any recommendations welcome.
Also, if anyone has ideas for exercises to strengthen the back of the head so he could hold his head up (any that we can practise in lying or sitting position) great!