What part it is?

[Renxus]

Good day,

Could someone tell me what is the correct name of this rotten part on my 1973 convertible? Need to find a new one.

 

[computercarguy]

Called several things online: rear cross member, trunk Brace Rear or trunk rear cross member. Trying to find a link to a reproduction piece but I am only finding up through 1970.

Edit: Found one:
First Generation 1971-1973 Ford Mustang Rear Cross Rail Trunk Brace - Dynacorn Part #MA26716 OEM Part #3649MB and here are a couple links.
CJPony
Kentucky