OsCommerce - Buy items after dimensions

 For a customer, I need a module for OsCommerce that can do the following:

The administrator can create a product, and enter what the price for that product is pr. mm,

The customer can then order a product, like a window, wooden plate, or anything else you may sell in your shop, by entering the dimensions.

The product page should look something like this:

http://dl.dropbox.com/u/2609738/Torben/product_dimension.html

This mod, should only apply for products where the administrator wants it.

For more detailed information, we can write together.