FedEx LTL Priority and LTL Economy

I’m looking for a WP E-commerce FedEx extension that will allow customers to select LTL Priority and LTL Economy. Does such an extension exist? I found this plugin http://getshopped.org/premium-upgrades/premium-plugin/fedex-shipping-plugin-wordpress/ but I couldn’t find any details. Thanks for you help!

https://wordpress.org/plugins/wp-e-commerce/