Allowing one time customer use in quotes and sales orders

 I would like the ability to make quotes and sales orders for clients that are only looking to buy once or clients that I do not want to add in to my client list.

Right now you can do a one time client sale in an invoice but you can't do that in quotes or sales orders.

What we have done is create a client called "One Time Client Quote" and we use that to make quotes for one time purchasers but if the client does end up making a purchase it is difficult to find the quote and then everything has to be re-entered into an entirely new invoice at time of purchase as opposed to converting that quote into an invoice.