Ubercart: how to automate quotation and purchase actions?

I am looking for a way to make a simple quotation and purchase action chain in Ubercart.

I installed Ubercart Price Quotes module (http://drupal.org/project/uc_quotes) which is very limited and does not give the functionality that i need.
Here is the action chain that I want:

1. Anonymous customer clicks product for a price quotation.
(Payment page is skipped)
(Review order page can be skipped)
(No order confirmation email is sent)

2. Anonymous customer is asked for email address only.
(account is created in background when customer clicks Submit)

3. Confirmation page of quotation request

4. Email is sent to customer with quotation request

5. Manually: Seller determines price and creates new node for the priced product. Seller emails customer with link to the priced product node

6. customer purchases the priced product online through Ubercart.

My questions are:
How can I make Ubercart skip the payment page for quotation products?
How can I make Ubercart instead ask for only an email address, with a customized confirmation page?

Suggestions are very welcome, thanks!
p.s. I am not a programmer..but I can manage simple script changes.