Know what you mean about Tam Lin. Love FC myself, too.
You could try the 'contact' option on FC's website - here - http://www.fairportconvention.com/contact.php
Just ask Peggy for the tabs, maybe...?
Just joined, so saying hello.
I am a beginner, having had some lessons over the last year or so.
My bass is a Satellite, which I am told is a 70's Japanese instrument.
Currently an 'at home' player looking to expand.
John.