Why not just design one you like in copper, and have them made in a bulk order on a CNC machine by a company that already makes small caliber CNC bullets. I can think of three companies that have produced .172" turned projectiles.
If you want something in a standard cup and core design you are probably going to be stuck with what ever is left over from those that have already been made.
What twist do you have, what is the case capacity?
If you are really interested in .14 caliber you might want to read this:
https://apps.dtic.mil/sti/pdfs/AD0331651.pdf