@paul2009 Regarding your solution in this thread, now that invoicing is possible with Squarespace could an alternate approach be to send an invoice to the customer for the remainder of the purchase cost once the boxes are ready? If I were to take that approach is it possible to make the physical product (which is the remaining cost to the customer) be a line item in the invoice? It seems I don't even need to create the physical product because line items in an invoice don't seem to automatically connect to store products, but I can type in the product name and price from scratch as a line item in the invoice, although I'd prefer the invoice to know I am invoicing for a physical product from my hidden Store if possible.