Solution for quotations

I’m looking for a plugin that does the following:

I create an exclusive page with products pre-added to the cart to finalize the purchase. For example let’s say that I did the briefing and I will sell 5 services, I generate an exclusive page where that person enters and ends the purchase, just fill in your data and pay. But she can add or remove what she wants and add details. It would be a personalized invoicing for each client and with own link, preferably with password.