Technical Trans rear mount question, 61 dodge...

So I swapped a alum 727 into my 61, and cobbled a rear mount for it that now I need to replace. I see that in 62 they had alum 727's in the imperials and other big cars which are similar to my 61, did the imperial have a different crossmember and mount? or is there an aftermarket mount I can use in my 61?

Thanks!