Lets see some mopar steelies

Im wondering what would be a better idea. The dart is getting the three inch inboard kit this winter and i would like to keep the steelies.
Wondering if i should buy a set of 15X10 or make my own using my existing rims.
If i buy them i will have to cut the rearend down to have the 4 1/2 in backspacing.
If i have them made i could leave the rearend alone.

What do you guys think the cost difference would be? Cause i do like the deep dish look!