Headset problems

Thought I'd resurrect rather than start a new thread.

Bottom headset cup on second hand frame is loose - Doesn't drop out on it's own, but can pull it out by hand. think it might be a JIS/ISO missmatch 30.2 mm vs 30.0 Any options - Heard mention of loctite/glueing it. Really don't want to have to shell out for new headset and fitting etc.

In the end i shimmed it with a bit of strongbow can and pressed it in with a DIY headset press. Seems solid enough. Will check it occasionaly to see how it fares