which kit have you guys used. My drivers side window has fallen down into the door. When i view it, there appears to be three white rollers (actually only one left the other two are broken, missing)...is this the roller i need 3 of? or should i just buy a new window regulator with them already on it??? do they press in, screw, or snap in? thanks in advance. my internet is slow as heck so...bear with me