I realize Portland Head is 'your' lighthouse (Nauset is 'mine'), but if you'd settle for another, there are some panels by VIP for sale at Favorite Fabrics
http://www.favoritefabric.com/cgi/co...on&key=VPSHPNL and some by Classic Cottons at Craft Town Fabrics (they also have a kit)
http://www.crafttownfabrics.net/cgi-..._lghts_60200-2 .
There is a PHL quilt block - 6" paper pieced pattern that you could enlarge
http://www.equiltpatterns.com/quiltp...roducts_id=721
A book titled Quilting Lighthouses of New England that is out of print, but maybe your library could find it.
http://softexpressions.com/software/books/LightHou.php
And a 12" block pattern of PHL that has much more detail than the first one. You could enlarge this one and it would be perfect.
http://www.thequiltingbear.com/products.htm
Hope one of those links proves useful.