Alpine Stars AND Thor both make a 'Shorty' boot for 50 racing.....
Now most of the 50s boots still have that nasty looking metal toe clip which, for road bikes, is not good for obvious reasons...
Thor and AlpineStars DON'T have the toe clips and they look as though they'll take a beating...
http://www.renegaderacing.com/store/med ... ch2Bts.jpg
OR Google Search Shorty Boots or Alpinestar Tech 2 Shorty.
Cheers..
jrad