Quotation Form block with complex logic

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Hi I am looking for a developer to build a Quotation system very similar to this onewww.www.valuegreenslips.com.au.... My client will be selling the same product from several different suppliers.

For the moment no online payments required (next fase), however since this quotation system checks best price from several suppliers some fancy logic requires on the backend and since rules are changed by suppliers on a regular basis we would need an ability to change some values.

We need :
Multistage form just like an example site provided
Ability to retrieve saved quote
Ability to change key parameters for decision making in admin interface.
Ability to export quotes as csv

edinkin