I will second Mario in saying if your trophy goal is a leopard you should hunt somewhere other than Namibia. Yes, they can be had there but the best way is behind hounds and not baited hunts. You don't state which method you will be hunting by.

I don't know the safari company you mention but leopard is one of the most difficult animals to collect. I know of many people who have spent three and four 14 day safaris and still have not bagged one.

Good luck on your hunt, I hope you get one, Namibia is a beautiful country.