Can anyone recommend a supplier of good quality foam for seating? I want to keep the same covers but the existing foam is not supportive enough for my liking - compresses down too much. Preferably a 'real' company that I can visit with the seats rather than one I have to post the covers off to. I want to try the foam out before I buy it. Currently in the Uttoxeter area so also preferably Staffordshire or that neck of the woods. Any recommendations gratefully received. Thank you.