ISX turbo/exh manifold combination T6

Does anyone sell an exhaust manifold that is a true T6 flange for the ISX? We purchased a PDI exhaust manifold because their rep confirmed it had a T6 flange. We get the manifold and find that they are using larger turbo studs than a T6 flange causing our BW 171702 not to fit unless we drill our turbo flange holes bigger. It is frustrating. We get our BW171702 turbos for under $700 and we prefer to stay with that turbo. I just installed a Bullydog 12.7 manifold and they stayed true to the T6 measurements. I am hoping someone out there can point me to whoever makes an ISX manifold with a true T6 flange. All this proprietary crap is frustrating and makes me not want to buy someones product. I may have to use an 870 manifold with an HX55 to T6 adapter from CPP.

This is on a pre EGR ISX

PDI manifold also does not allow the factory oil supply and drain lines to line up in their original location.