Crazydemon i have a set of aluminum slots exactly like those,there off of another Duster i had.
I don't know why i kept them i'll probably never use them.
To bad you didn't have that up for sale 6months ago when i was looking for a Duster,i would have bought it! :(
I think you need another one lol. But what size are your slots? and bolt patern? I need a set of 15swith 4 1/2 BP if I get the RR. The ones on the Demon are 15X7 on the back and 14X6 on the front.