wideband o2 sensor gauge kit

I am looking for a diesel wideband o2 sensor gauge kit so I can fine tune my truck, but all I find is 10-20 ratio's. Need to go up to 30 or 40 for a correctly running engine. Does anyone have any ideas of getting one. Just a standard 52mm gauge would work fine. thanks Jerry

Have a look here [url=http://www.skynam.com/product.php?id_product=126]http://www.skynam.com/product.php?id_product=126 I did get there O2 sensor kit but did not run any test on how good or bad it is. But must say normal 02 sensor kit we are able to dial in fuel no problem.