Your best option is to buy some casting equipment and make your own.
Its fun,interesting, and rewarding!
My suggestion is if you decide to try casting your own, read up on it on the "Cast boolets" web site.
Ask all the questions you want. They are like this site, very willing to help!
I also suggest getting a 190-200 grain flat pointed round nose "Ranch Dog" or "NOE" design moulds (typically drop .360 diameter bullets better suited for most .358 caliber rifles shooting cast bullets).
These type of bullets really seem to hammer the black bears, and deer!