Hello Sam,
I am John from Shopilabs.com. I have gone through your requirements of categorizing products and preparing CSV for import in Volusion and we are interested to proceed to have a detailed review.
As a glimpse, I would like to share that we are team of people working for online stores especially for few platforms including Volusion, Shopify, BigCommerce, WooCommerce etc.
Let us know detailed requirements and we can proceed after that for estimations for the same and deal with mutual understanding.
Awaiting your reply,
Best Regards,
John