If you can take the shifters off then you could use these
http://www.ebay.com/itm/Shimano-Cabl...item53e9d45099. There are curved back and flat back stops, so be sure you get the right ones.
If you can't take them off for some reason or the current band doesn't work then you could use this
http://www.ebay.com/itm/Shifter-Boss...#ht_764wt_1270 or buy them together here
http://www.ebay.com/itm/Cable-Stop-C...#ht_500wt_1287.
Or if you don't care about the barrel adjusters you can find clamps for that too.