i used a deflex one,bent the "hook-end" on the end can hanger,greased it up nice and slid on nae-bad,when it was on in place,put a drift of some kind behind the hanger and re-bent the "hook-end" to its normal possition.

by the way,my magnex back box is on an angle too,juss a little closer and neater to the bumper.it wont sit level period.