The crossmember is #3601 Competition Engineering from Summit.
First step to the crossmember installation was to relocate the emergency brake pull cable from inboard side of drivers side subframe to outboard side. Used a Lokar Universal emergency brake cable that originally was purchased for the Kore 3 C5 brakes, but now I rerouted for crossmember clearance. Worked out so nicely I realized it should have been done this way from the beginning.
Area cut from

Outboard relocation

Now for the crossmember. I welded some plates which extend from the frame up to just below the floor. My decision for this was for two reason, 1st being this put the crossmember high enough for a direct exhaust shot rearward from the headers. Should keep the pipes tucked up neatly to the bottom of the car.
2nd, having it up this high gave me access to drilling holes and using 1/2 bolts from the inboard size and while able to access the nuts on the backside of the plates. Should make future installations and removals easier leaving this main part as a bolt in. I'm very happy with how this turned out, especailly for the price.