Ok, so it was a simple matter of adding the following code to the use SOAP::Lite statement. 
use SOAP::Lite 
   +trace => [ transport => sub { print $_[0]->as_string } ];

[download]
Not quite as flexible as I was hoping, but it does the job. Thanks for pointing me in the right direction.

In reply to Re^2: Displaying SOAP::Lite request XML by Rice
in thread Displaying SOAP::Lite request XML by Rice

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