Ha, thanks for the recommendation, Mike.
Anyways, yes, I can sell you a complete discounted package on both a swingarm and rear shock. You won't get the same pricing by buying separately... If the OP already PM'd me, I am currently out at Truck Haven near Salton City, but I will reply to your PM when I get back into town on Monday. I am in Temecula, so I'm local, and can get you dialed in.
Also, a +6 would be GREAT on a dune bike. Take advice from those of us who actually ride dunes.