Wordpress - Transfer existing data from Shopp to Woocommerce Tickets

General information for the website: Website which sells event tickets
Kind of development: Customization of existing website
Description of requirements/features: My client currently has an online store on Wordpress offering tickets to events - One ticket per events.

They're wanting to change platforms due to various issues with Shopp, so I require a script which will do a seamless transfer of all orders, events, tickets/product association, customers and orders.

It's a live store, so it needs to be a script that's produced, that I can run when the switchover is ready.

I've seen services such as shopping-cart-migration.com, however they don't seem to transfer all data - That said, I'm happy for you to use such a service if you need to though.

The site currently has:

- Around 120 events, 60 of which are active.
- 2100 Orders
- 2100 Customer Records

The platform currently uses Events Calendar PRO for the integration, which can be utilised once migrated across Woocommerce Tickets.

Code for the script MUST be object-orientated, well-commented, and documented for any future changes should they be required.
Extra notes: