Sent them an email and got this response:

"We are able to take orders for the S&W N Square and S&W K/L Square Coke Bottle grips now. They will be available for shipment in 2-4 weeks. If you are interested in either of those, we can send a custom PayPal Invoice via email or you are welcome to call to order at 1-800-626-5774 ext. 10.


The S&W N Round Conversion and S&W K/L Round Conversion Coke Bottle grips are coming soon! We don't have a release date available yet, but we can shoot you an email when they become available if you would like?

Thanks,
Altamont Sales Team
901 N. Church Street
Thomasboro, IL 61878"