This is what I made up to take the place of the old cross member. I had the rubber mount in my shop not sure where to get another one. I use 1X2 or 1X2.5 (it fits tight into the original cross member) rectangle tubing to go over the trans to help tie the cross member back together with a notch out of it for the trans wiring plug in that area and it will be welded in place. it will also support the new trans tunnel. Then I use some channel of the correct size and some round 1.25 tubing to fab the lower cross member to support the tailstock at the two holes near the pan and it bolts in to the original cross member bolt holes. I also made a channel support for the rubber mount for torsional support under load, I did not use the rear hole that you have marked in yellow as I feel I have enough support and it is busy enough to route the exhaust with out a second cross member for the trans. Hope this helps