That's some piss poor customer service. "Yes, we sure can"? Seriously?

The correct answer is:

We are not able to fulfill your request at this time. Due to time constraints and overhead, it is not possible to create anything other than what our accounting staff will allow and what Wal-Mart will buy. That particular chambering is unproven and we would be unable to test it due to the lack of available ammunition. Further, we have already decided that left-handed shooters only comprise a small "niche" market that we are not interested in pursuing. Your best remedy is to purchase our fabulous right handed 30-06 and learn to shoot it. This isn't Burger King. However, if your purchase in the next 30 days, we will include a coupon for one (1) Happy Meal at the McDonalds of your choosing.

Happy Holidays.