Bolt up after market crossover/collector!

So getting frustrated!
2004 3.4 dual cat does not play well with aftermarket headers.
You have to cut/weld 4 flanges
To even begin to get a “factory”
Clean install. Does anyone know if
There is a bolt on header that works with factory dual cats?
Seems like there is just not enough room to do all that.
I can see it working with just rear cat but need to be legal.
Or just fully weld both cats to crossover/collector which I don’t really want to do. (would like to be able to replace parts without major work)