I've been looking at Armageddon Turbos but its pretty expensive - about $10k
https://goturbo.net
I'm a member of TurboForums and most of the players on there build their turbo kits. The Chinese kits are OK because they say most are hit-or-miss but the turbo's in the kits are for ****, half the piping is not an exact fit, and they usually throw in cheap waste gates and controllers which end up killing engines on DIYers...so they also need to be upgraded. You are better off finding a turbo that fits what you want and buying the parts individually. Its more of a PITA to do but you will spend a little more than the Chinese kit and walk away with a Turbo setup 10x's more reliable than those kits plus make more power.