Cut it off, grind it flush, drill it and use a high tensile bolt.
If your feeling bling go for stainless. Since its only a suspension damper its not going to be taking any structural loading (unless your dampers are too short any your on full articulation)
http://www.ebay.co.uk/itm/110991073694?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649How about one of these?