I need an unmolested 1/2 oz bushing type charge bar for a 600 Jr. Can purchase out right or would trade any 3 of the following bars: 302- 1 1/2, 1 3/8, 1 1/4 x2, 1 1/8 x5, 502- 1 3/8, 1 1/4, 1 1/8 x5, 1/2 Thanks, Wayne