Christmas Day my step son was showing me some of the things he had done to
'trick out' his Honda motorcycle.  And this item caught my attention:
<http://fuzeblocks.com/index.php?pid=10#fz1>
Very very compact, ideal for some of our Westy applications.  Not cheap by
any means but appears to be very well made.  Read the specs, includes a
relay and a switch.