Liferafts
I went down this route a couple of years ago and went to the boat show to check out the quality of different makes.
You are looking at a four man raft with a weight of 22-26 kg in valise form.
The aviation ones are lighter but also light weight built,and expensive.
I decided upon the Plasimo Cruiser. Very well built and good value for money.
Or you could put the money towards a top overhaul on the engine!!
Pobjoy