http://www.ebay.com.au/itm/D1-GROUN...ccessories&hash=item3369ca67f3#ht_3100wt_1139 Worth it, seems pretty decent for the price.
hey mate, just make one with 8 gauge wire heat shrink and some ring connectors from jaycar - daisy chain the lot. will be just as if not more effective than the one pictured and you can do it for under $30..
