This is What helped me the most.
I bolted the best fitting center hump I had.
(without using the Original one)
I used long bolts as studs screwed in from
the bottom
(So I could pull the floor hump down with a washer and nut )
And the bolts I could start from the top side,
I put nuts and washers on them and slowly
tighten the nut and
worked with each bolt till I got the
Trans hump pulled down tight.
This put the toe panel and the floor fit good in the
front center of the floor.