They have these in channel ones on ebay, don't know if anyone has tried them
http://m.ebay.com/itm/261583651301?nav=SEARCH
http://m.ebay.com/itm/251731578005?nav=SEARCH
I have these installed
http://m.ebay.com/itm/400820149625?nav=SEARCH
These are not in channel but they have the chrome trim