Why arent you with him to wake him up yourself?

Can’t assist with advice. I hope you will find some good advice

Interested in the answers to this one. My mum is currently looking for one

I found this Device at TABTIMER a Australian based Company https://www.tabtimer.com.au/vibrating-clocks. Their statements says QUOTE: Vibrating Clocks
These vibrating alarm clocks are especially designed for the deaf, hard of hearing, blind and heavy sleepers. They all feature the ability to connect a vibrating bed shaker which placed under the
mattress can shake awake or alert the person when the alarm is due. They are in Alexandria NSW Ph; 1300 822 846. I have bought a few items here for my parents and their friends.

I’ve heard positive stories about the Sonic Alert SB1000SS. The Sonic Alert SB1000SS Combination Alarm Clock with Super Shaker is an extra loud alarm clock that comes supplied with a vibrating bed device. This alarm clock for deaf people has been designed with hearing impairments in mind and aims to awaken the deepest of sleepers. It’s not that expensive

There are tons of alarm clocks that vibrate (my son is deaf) – just google them – although they tend to start around $300. My son prefers a vibrating watch under his pillow – this cost us $80 through Amazon. The brand name is WobL.