I have 2 dawson tool-less guiderods that i replaced in my STIs. One of them is brand new, the other has maybe 100 rds on it. $50 each. (guide rod only). Make sure your reverse plug is the correct type or this will not work (see link below). https://dawsonprecision.com/guiderod-1911-5-bushing-barrel-tool-less-by-dawson-precision/