Alfa Spider front bow bumper for convertible top

This is the bumper (aka plinth) that the front bow of the convertible top rests on for 67-69 Alfa Romeo Spiders. More information on this part can be found in this AlfaBB thread: http://www.alfabb.com/bb/forums/car-restoration/158186-67-duetto-convertible-top-frame.html Two are required per car (one for each side). The remaining hardware parts to install it can be found at a hardware store or online at McMaster (as per picture): Thread-forming screw: http://www.mcmaster.com/#99461a360/=s7yw0x Washer: http://www.mcmaster.com/#90965a170/=s7ywbn Lock washer: http://www.mcmaster.com/#95060a350/=s7yx2q Rubber caps for the bow ends: http://www.mcmaster.com/#1670k1/=s7ywim Note: Part has a 4.2mm hole at the bottom