This is a IC for 3.5mm thick noise / resonance damper pads similar to the ones GON sales. (see here (http://www.gonskeyboardworks.com/others/21-filler-for-controlling-ressonance.html))
example Image:
More
(http://www.gonskeyboardworks.com/71-thickbox_default/filler-for-controlling-ressonance.jpg)
I'm located in the EU and will ship those worldwide, although shipping to the US in a package with tracking is ~16€ and in a envelope (size 45x35cm) is ~7€.
If there is enough interest i will run this as a GB soonish, with prices around or below the GON price.
Most likely in 3 sizes (60%, TKL, Fullsize).