MyFonts is not yet authorized to sell this font directly. However, Letraset and ITC offer the font for sale at MyFonts:

Retail Script

family of 1 font from Letraset

$39.96

Retail Script™

family of 2 fonts from ITC

$26–$1,299

You may be able to find this font at the following web site:

• Fonts.com by Monotype Imaging