Exahust manifolds

Man not horrible news but kinda bad...just found out that one of the manifolds original to the 73 340 engine is not useable. is it to a swapmeet for me to pick up a single manifold or ebay or is there soemthing else that works on a 73 with PS manifold wise that would be inexpensive? I was so flustered when i found out I cant even remember which one he said was good now the DS or PS manifold one was broken/cracked when taken off for the headers and thrown out...I thought we had both of them.....but when I talked about putting the manifolds back on he said...you know you need one right? lol so went from thinking I had a full set to just having one.