I think I may have a solution - well a semi solution anyway.

I have been literally stuffing pillows under my body and have come up with the following,

A thinish pillow (standard size) under my belly running length ways along my body but laying half on it. Then I use my thick U shaped pillow following the curve of my body on my back, again half laying on it. This tips me slightly more on to my side and onto the front pillow.

I sleep with a U shaped pillow and standard pillow anyway so I prop these up and arrange them to make the other two pillows more comfortable .

I can still feel the bed under my body for the pressure seems to be off my hip area because this is kind of suspended from the two pillows - sorry I cannot describe it properly.

The only hassle is when you change sides ( I am a restless sleeper so I toss and turn all night) and you have to swap all the pillows around.

Anyway I hope this helps others

Nae x