I've been looking for something like these for ages and came across the Skybolt site a few weeks ago. The ones pictured are the 2500 Series (about 3/4 the size of what we're used to seeing from back in the day and ideal for attaching the upper and lower TT fairing. Huge assortment of prices and styles, great price, fabulous service and beautifully made.
http://store.skybolt.com/cloc-2500-series-studs-c142.aspxA M6 x 15 screw is in the picture to give you a sense of scale..
Oh, and they're made of "Skytanium" which is definitely worth a half a second per lap..