I was confused when you asked this on FB.
Are you talking about the TWF 'Double D' 17" wheels? They're $500 per wheel.
http://www.trailworthyfab.com/17-Double-D-s.html
At $2k in wheels and $1200-some for 37"/17" tires, those 900-16 must be crazy expensive!
I just run $100 surplus 37r16.5s, cause I'm cheap (and have Ford axles). I'd love some DDs.