I started with an STL i downloaded of the karambit, and then i edited it into 3 parts so you can print the middle out of metal if you want, and the left and right halves of the handle out of something else like plastic if you want. I included the crimson web texture, as well.
UPDATE: i also included an eightfold (8x8 crimson web texture squares all put together)
also, heres a link to the original one i made and put on grabcad:
https://grabcad.com/library/cs-go-karambit-crimson-web-factory-new-1
this is a reupload of mine from thingiverse.
The author marked this model as their own original creation.