You could have an XKE handle or, less likely, an ERA-made replacement. (I don't remember how long we've been making them...).
If the handle looks like this, it's one of ours:
We can supply parts or complete assemblies. It is also a bolt-in replacement for the XKE unit. - $250.
If the top of the tube is more rounded, it's an XKE. You'd have to have it re-chromed.