there isn't really anything BC specific that I can see. you're using Viair, Danz, and Dominators really. a random tank and some brackets.
Danz valves = $45ea = 360
viair 380s = $320
Dominator 2600s = $300 (more travel on these too I think)
brackets = $150
tank = $90
notch = $150
airline = $30
fittings............... $150? more or less. I can never remember.
$1460 at avs. +ship.
thats all current pricing at
www.avsontheweb.com and I rounded up on everything. thats where I got my parallel 4-link kit at. I liked them. might spend a little less on fittings. I spent a ton on fittings, kept going back to get different sizes and stuff.