3 way fridges

Val, sure you will get a variety of views!  I have a Thetford, it is 9 yrs old and has been fault free.  I assume you have checked the prices, they are shocking

I think it is pretty much only Dometic and Thetford that make them, and they are indeed a terrible price.

You could look on e Bay, Amazon, Gumtree and Preloved to see if there are any decent ones at a decent price, also try caravan breakers.

Otherwise Google will be your friend.