Interesting how many people have Focal speakers now. When I got mine, some 19 years ago, they were almost unheard of here. Mine still work like when they were new. And of course if you put one in each door, it will help with your reading too, as they would be bi-Focal!
The other tricks I have used (if you are interested), is to use a thick piece of flexible plastic wrapping, like you would take off a mattress or something, and use it as a water protector. Stick a piece in the speaker mounting spot, and then put the speaker in. You may need a small hole to run your cables. Eventually the cones on my speakers fell apart, until I started doing this. Never lost once since. Trick two takes more effort if you are keen. I have not done this on a Patrol, but most moulded door trims have a space behind them, where wires go and of course speakers. I have used pieces of marine ply to mount the speaker in. Depends on how much room you have, but it makes a more solid mount, and sounds much better.