Both of these are interesting.
The XREP seems to have fallen out of use around 2011-2012 and are collectors items. I have some information on them and I'll give it a look over to see.
As to the Shockwave that seems to have completely disappeared around 2009 and off the radar by 2011. It looks like it was a prototype in 2007-2008 and was to go into production in 2009 after some field testing. I can find any good information on it currently, but I'll keep searching.
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