My current tanks center braces have broken and I have tried 2-3 times repairing them using thick glass and silicone. It holds for some months but then they end up giving way. I dont know what else to try so I decided to try and replace it. The stand is 72" long and 24" wide so mostly looking for either a 180 or 220 or anything with similar dimensions. Right now the tank is running with a clamp as a center brace 
Edit: I am located in Central Florida but am willing to drive for the right deal

Edit: I am located in Central Florida but am willing to drive for the right deal