Are you able to do a custom integrator that we could sell and support here in Australia for an Aussie written accounting software? They use a system from Arrow and they would like to get it integrated with their WooCommerce website.
I took a look at the Arrow website and it doesn't seem like they have an application programming interface (API) which we could use to communicate with their software. An API isn't a necessity, but it does make an integration with their system easier if they have one. If not, we have a variety of options to integrate with Arrow, but would need to speak with them to understand which one makes the most sense.
Please Contact Us and we'll be happy to work with you and your customers to get Arrow integrated with WooCommerce.