Need help finding 63 riv transmission mount.

Hey guys, do any of you know where I can get a new tranny mount for a 63 Buick dyno flow tranny. The places we did find need a core and the core we have is split in half and not exchangable. Thanks for the help guys.

 

I used a trans mount from a power glide in my 63 Rivi.

 

Split in half on the metal parts, or did it do like my '60 Pontiac mounts and split through the rubber? If it's the latter, it's exchangable... I'm guessing no, but figured I'd throw it out there.