Pricing system for replacement kitchen door website wanted

I am looking for someone to develop a pricing and quote system that I can add to my website, so users can price up their order, add accessories and print it out and also submit it.

I need the system to be easy for me to change the prices, and to allow voucher codes for discounts.

Further details can be sent to you.

We are on a tight budget, as this is an add on to our existing business, but there may be subsequent seo work for our other sites.

I look forward to your replies

Steve