Just read my mind..
I am after some new ones as my kness have been bad lately..
I am gunna give these a try..
Alpro Professional Knee Pads

Sorry about the recent price increase - this is due to the bad exchange rate between the Euro and Pound
Alpro
knee pads have been designed specialy to prevent and heal knee problems. Ergonomically designed by a German knee surgon to distribute the pressure of your bodyweight.
These might seem expensive but they really do work. We have been suprised by how many people have told us these knee pads have stopped their knee pain.
Made from a strange synthetic foam which quickly molds to the shape of your knee. The square face stop the pads from rolling sideways. Elasticated velcro fix straps
From Trade tiler.. Tradetiler Tilers Knee Pads