We coded and support following plugins for Woocommerce:

Advanced Order Export, Phone Orders, Advanced Dynamic Pricing

The resources for export plugin: code samples , codes for some plugins and FAQ

You can submit ticket to Support (not 24×7, but free users are welcomed too).

Please, mention plugin name in ticket.

Recent changes in Pro versions (this version already includes all changes made in free version).

January 16th
Dynamic pricing: version 1.5.2, complex cart condition “Product Combination” – check some samples

December 11th
Advanced export: version 2.0.1, updated section “Setup fields”

December 4th
Phone orders: version 3.2.2, override link “Customer payment page” in order, “role” field for new customer, checkbox “tax exempt”.

Free plugins are available in official WordPress repository.