Here's several parts kits for your STI grips. Factory replacements parts for your build, rebuild, or spares box.
Kit 1 is the complete kit which contains two long and short grip screws and bushings, two trigger guard screws, 1 sleeve and allen wrenches. Price is $26.99.
Kit 2 contains 2 standard grip bushings with screws and allen wrench. Price is $10.95.
Kit 3 contains 2 oversize grip bushings with screws and allen wrench. This kit is great for well used or worn frames. Kit will restore that tight fit like it was new. Price is $10.95.
Kit 4 contains 2 trigger guard sleeves, 4 sleeve screws and allen wrenches. Price is $10.95.