tubular -
http://www.avsontheweb.com/product.p...cat=478&page=1
not tubular -
http://michiganmetalworks.com/store/...ory&path=60_65
I've had RideTech's tubular upper and lowers and they will not layout without modification to the frame. Which makes sense because that is not ridetech's goal for air ride. I'm personally leaning towards mich. metal works for arms (their cheaper set), but i've never tried the flat arms before.
Great build and good luck!