Injection Molding Spiral Bevel Gears

Hello –

I'd like to injection mold a set of spiral bevel gears for use in a new product. I've been told the tooling for this is extremely difficult. I understand that the geometry of this type of gear is much more involved than a straight cut bevel gear and am wondering if this type of gear is ever injection molded. I would appreciate your thoughts. Also, if you could point me to examples of plastic molded spiral gears that would be great.

Best regards,
Jason