You could try buying from marco and shipping to IPB and get Mark to ship it maybe? Or get a US friend to onship it for you.

Greg at RTBB has heaps of stuff sent to us all the time from Marco and we ship it to him along with our shipments.  The biggest factor with backglass is of course the fragile factor but also it requires double/triple packing.  With the size restrictions on basic shipments it can be difficult to ship the glass properly and still fall in the size restrictions.  At least with BK2K the glass is a bit smaller.  Be aware that shipping for the glass may be as much as $150usd depending on the final weight.