During my brief ownership (and even more brief flying time) with my Shockwave I managed to break a spar, and replacements only came in pairs. I forgot to include the spare when I sold the Shockwave and am having a loft clearout so it needs to go. The spar is unused and measures 612mm long by 7mm at the end (it tapers slightly toward the middle).
Please reply/PM me if you're interested