saw these door bars on ebay :http://www.ebay.co.uk/itm/110765355521?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_563wt_1251 thinking on making some of my own up, cant see what it bolts to at the top though can someone tell me or show me some pics how it would hold at the top please? cheers!