Can any one suggest a ready made knee pad for Polio affected Leg (manufacturers' Web site)?

the knee pad should be assembly of three parts (for thigh>knee Joint>leg) to give/allow natural moment - for a weak polio affected leg. Pad should transfer the body weight (first at Thigh then dirctly to bottom of Leg - to reduce strain to Knee joints/leg. Pad should facilitate easy walking. I have seen some people wear this - but I don't know the manufacturers address/where to buy. The Plate Angle joints, etc., are made of low weight Titanium toughned sheet, gently covered with soft materials. with this pad some Polio affected personnel walks as normal man. I was told these products are available readymade - easy to use. - mfrs are mostly at USA/Germany and at developed countries.

I could not locate a suitable shop in India. - stiff pad only available in India - not useful for easy walking/sitting.

Can anyone help me by giving their web sites.

Thanks with anticipation of suitable help