Trans Mount Mystery - need help

Strange days

I have a '61 Lancer with an A904.

The trans mount is shot.
They are not to be had (unless I want to pay $100+ for an original which might by now have rubber hard as cast iron).
No one makes a poly repro, and I don't want one that hard anyway. They're like a solid mount vibration-wise.

I've been told that mount is only for a 170ci Slant Six.

My engine is a 1968 225 with stock trans cross member.

BUT the real question is: will a 225 ('62 - up) trans mount fit my cross member?
It looks like this:
s-l225.jpg

My 170ci mount looks like this lancer trans5.jpg s-l225.jpg

Will the '62-up trans mount fit my '61 cross member?
Thanks!