Here's a copy and paste from my build thread. I can sell you a flange for $50 shipped to get you started.
Here are the current specs of my build and where I got the parts from:
2007 Chevy Colorado 2wd Base Model
2.9L (LLV), 5 speed manual (MA5)
92 octane
8psi boost
5 million hp (est)
Turbo: Turbonetics T04E "50" 54mm compressor, 57mm F1 .63 a/r turbine, bb & wc
Source: used on eBay
Manifold: custom 1.75" primaries, equal length, 4-into-1
Source: Summit (tubing) and me (flange and fab)
Wastegate: Turbosmart Comp 40
Source: eBay
Wastegate plumbing: 1.75" tube and flex section
Source: Summit
BOV: Bosch bypass valve
Source: used on eBay
BOV connection: 2 1/2" to 1" silicon "tee"
Source: eBay
Intercooler: 2 1/2" same side in/out air-to-air
Source: eBay
Boost Plumbing: Aluminum pipe & silicon connectors
Source: cxracing.com
Vacuum tubing: 7/32 rubber stuff
Source: local parts store
Oil Feed line: Turbonetics -3 x36" braided stainless line
Source: Summit
Oil feed to turbo fitting: Turbonetics fitting with screen
Source: Summit
Oil Drain: 5/8 Hose
Source: local parts store
Oil fittings: 1/8" npt to -3 an (feed); 1/2" npt to 5/8" hose barb (return)
Source: Summit
Oil feed adapter fitting: 1/8" npt to whatever thread is in the block above the oil filter
Source: Limeswap
Heat sleeves for rubber lines: Summit brand 1" and 1.5" ID
Source: Summit
Injectors: Siemens Deka 60 lb/hr
Source: Limeswap
Injector Harness: adapts these injectors to factory harness (07+ i think)
Source: Limeswap
Tune: Mail order (loaner pcm)
Source: Limeswap
MAF housing: 3" OD (2 7/8" ID) aluminum tube
Source: cxracing.com
MAF flange: aluminum weld-on (currently bolted on)
Source: Limeswap
Meth Injection: AEM universal progressive kit #30-3000
Source: Summit
Air Filter: Factory paper filter
Source: came with truck
Exhaust: 3" downpipe and system, no cats, 3" Walker Quiet-Flow SS
Source: eBay (muffler), Summit (tubing)