Forty Below Purple Haze Over Boots.  $40 shipped to the lower 48 states.  They had some repaired crampon divots that were repaired when I bought them used some years ago.  See the photos.  They work very well as they are.  I used them on approaches which allowed me to use a less cumbersome boot when I got to the actual interesting part of the climb.  And in the high mountains where it was just too cold not to put everything on.