Two stud transmission mount for cable shift 904
or try talking to the guys that make/made them...
Mackay Australia | Manufacturer of Quality Rubber Products
drop them a mail
see if they supply someone in the US with any of their other rubbery products
get on to who they supply and say can i have one of these mounts in your next shipment Pleeeeease
whilts hemi performance have many nice things for sale they know they have a limited audience for their products and they know they are one of a handful of chrylser specialist in the Australia and Newzeland area so they can pick their price based on supply and demand
Plumbcrazy dudes do em as well
Transmission Mount (Dual Studs) - VE-CM
these guys probably have them
Elko Performance but like to make life hard by never telling anyone what they have for sale by having a cumbersome and awkward website. they like you to call
In the US you could try mitchells autoparts AKA AMS obsolete auto parts
https://www.amsnos.com/ if they have one it will be genuine NOS and obviously the state of the rubber will be totally down to how well the part was stored
or there is this
Gearbox & Transmission Mount (Heavy Duty Replacement) for AP5, AP6, VC, VE, VF, VG, VH, CH, VJ, VK,
at massive expense
or you could search the junk yard for one of these
1973-76 A-BODY TRANSMISSION CROSSMEMBER - Mopar A833 4-Speed Transmission & Component Specialists
the holes are in the right place but the indent in your drivers side of the cross member on the car i not replicated on the bolt on member so you should fill the space with washers
and fit this
https://www.rockauto.com/en/moreinfo.php?pk=5404638&cc=1088603&pt=8756&jsn=570
which is $10 and you'd need to buy a big bolt