Let's say a customer calls us and we discuss a dozen items or so and he is interested in proceeding with ordering them online. (via our ZenCart)

I'd like to be able to email them a link they could click to be able to add those dozen items and the particular quantities we discussed to his cart with one-click.

From there, the customer could decide whether he wants to delete anything off or change quantities.

Is there an add-on module that allows for this or similar?

Thanks for your time.