http://www.amazon.com/gp/product/B0013NGQ8I/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1
It wasn't the shin damage that did it for me. It was going over the handlebars and picking dirt out of my knee. Now whenever I touch a certain spot I feel tingling all over my knee.
https://www.amazon.com/gp/product/B0013NGQ8I
BMX MTB knee and shin guards. The mobility in these is great.