I just received a pair of these, they look like really good quality for the money.
http://www.ebay.com/itm/150768829908?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Although these aren't an exact fit for a 1157 they fit the housing perfectly and I reamed the rim where bulb sits to fit a 1157A and it works great now my original socket was shot.
http://www.ebay.com/itm/150768829908?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Although these aren't an exact fit for a 1157 they fit the housing perfectly and I reamed the rim where bulb sits to fit a 1157A and it works great now my original socket was shot.