In looking for electrics for my Honda s800 restoration, I found a site http://www.vintageconnections.com which sells stuff for Japanese restorations (I'm all about the J-Tin these days!), but there's some crossover with both Ferrari and Lamborghini when it comes to the style of terminals and terminal covers.
And since it's meant to go into a Japanese car, you know it's going to work - what could be better!