Location of ThaiInputMethod in JDK7

[Donald McLean]

For years I have experienced a problem where, when I run Java on a Mac, 
it wants the Thai input method. In the past, it was no problem - 
thaiim.jar was easy enough to find and move into the "lib/ext" directory.

Where do I get thaiim.jar for JDK7 - it appears to have been moved, but 
I haven't been able to find out where and I'm still getting an error 
running a Swing app: java.util.ServiceConfigurationError

So, where would I find thaiim.jar (or the source files, if necessary)?

Thank you,

Donald