Custom product properties on Quotes

Hi,

For our invoices we need to display the

‘Address’ of the contact on the invoice/quote

+ the custom property ‘VAT-number’ of that client.

At the moment it’s not possible to add a custom property and as a consequence to display the VAT-number of our clients on the quote, and therefor we can’t use the quotes-system of Hubspot.

It would be awesome if it became a possibility to add a custom property to a quote.