LogInHere's a powerful tool that will help you deal with hair cards in Maya.
GS CurveTools is a neat tool for Maya that lets users create and manipulate geometry cards and tubes (Curve Cards and Curve Tubes). The plugin is meant for hair card creation, creation of complex procedural braided cables, and more.
The developer that the tool's main power is the "ability to quickly create a complex network of nodes, tailored for fast manipulation of geometry in a smooth and natural way."
It mainly focuses on Hair Cards workflow as almost every game uses some form of hair cards to create complex hairstyles for characters. The tool lets you quickly create new hair cards by convert curves to hair cards and quickly changing its parameters.
You can learn more and buy the tool for $25.99 here.