1985 300sd exhaust pipe hitting frame

[86Merk]

1985 300 SD

I have a clank which, seems to originate near the transmission tail shaft, that shows up under moderately hard acceleration (as if!). It sounds like the exhaust pipe hitting ... something. I've replaced the transmission mount and 4 exhaust hangers but haven't resolved the issue.

I found a post from 2019

1984 300DT: replaced air cleaner mount, exhaust still clank clank clanks at idle.

which states "Will need a new down pipe bracket to gearbox fixing kit from Mercedes .The rubber bushes inside the bracket they wear out and fell on to the road .Heat is a big problem with these rubber insulators . I had the same problem and i used all sorts to stop it but in the end a new bracket fixed the problem on mine."

Does anyone know the part name or stock number of this item, and where it is located? I had planned on engine mounts next but this post is nearly identical to my problem.

Thanks