I have used my Olfa Razor cutter for years and was not able to find the exact match any more so I ordered just the basic razor blade then made the sleeve to insert it into. The yellow knife is the original, then the basic knife, then the PLA sleeve, then the completed unit. Made with PLA. 205 on the hot end, 50 on the bed, 1.6mm layer on a glass bed plain. No support was neded.  It was printed vertical with a brim.  Enjoy!