Wastegates for GT3076R

[Kaiser370z]

Hi guys,

Recently I bought a used GTM/Gamma stage 2 twin turbo kit with GARRETT GT3076R turbos
Anyway, the missing parts in that kit are the wastegates
Even their's pipes aren't there
So I have two choices:

First, to buy a couple of Tial F41 wastegates and fabricate a pipe for it.

Second, to buy an internal wastegates with their sprockets which is easier and cheaper

Keep in mind that I am looking for 1 bar boost

I really need your help regarding this. What should I do?

BR