Looks the same to me. I now have to get new straps cause one broke and I need a new lock ring hopefully not a new tank also. Hope I can save it.
You could always hit the local UPull if you have one and the trucks aren't too rusty.... Be sure you get the right lock ring. I'm pretty certain that the Flex version is different from the non-Flex ring. Maybe not, though; I know the pumps are different.