Couple of ways you can go.
Adapt a newer style cross member to your older transmission.
Make a mount and use a full sized poly Ford transfer case or transmission mount for actually mounting the transmission, the ones for a 1985 were less then $10. If you end up eating through them, then try poly, which is what I eventually used in my E-250 4x4 cross member, under my transfer case.
If you get a standard hard rubber boat roller in the 3" size
such as one like :
Check out our 8 3/4
www.westmarine.com
they fit inside a standard 3" wide steel pipe nipple, which measures 2.5" tall. Which besides being good for a quick and dirty body lift, makes a good transmission mount end that is close to stock and the hole is already 1/2".
What I did to make replacement hardware for my body mounts you can do with the rubber rollers too, so the tap bolts threads (I use 1/2 coarse x 8" grade 8) do not eat up the rubber. Get 1" tubing, 1/4" wall, drill the center out to true 1/2, drill the bushing-roller out to 1", and cut the tubing to length. Attached is what I did to use my new James Duff poly body mounts with a ghetto fab 3" body lift. I drilled out all but the two radiator mounts, out to 1" and inserted these bushings into them. I chamfered the edges to ease assembly. So, they would not fall out while assembling I used a squirt of hot glue while twisting them into the poly mounts.