Can support brace help!

[btoffutt]

Hit a stand still on 79 k5 build. Had to replace all my floor pans. After cutting them out found my support braces were gone to. Found all new ones except for one. It is the brace or cross member underneath the back seat where the rear cargo floor pan bolts down before dropping down the passenger cab area. It runs the whole width of the blazer and has bolt holes in it for the floor pans to bolt to. Any idea what it's called and where I might find a new one??? Help needed plz an thnx