Web based delivery pricing system - where to start?

I've been asked to quote on how long it would take to deliver a system such as can be found here:

http://cgi.tnt.co.uk/ratechecker/enter_details.asp

The client basica开发者_StackOverflow社区lly wants to give quotes for shipping based on a number of variables such as weight, distance etc, and for it to be accessible through their website.

I've thought of the Drupal/Ubercart/Shipping combination but this isn't really what it's designed for. A paid for, off-the-shelf system would also be great but I can't seem to find any that do this properly..

What would be a good system to start with here, or alternatively is there a system that already does this?

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Well, if you have all the variables AND the business logic, what's wrong on rolling up your sleeve and writing your own?

Those things usually varies from company to company. For instance the TNT website quote that you pointed as a sample is not valid for, say, FedEx, which in turn isn't valid for UPS.

Every company is different in these aspects, so to create an on-line price quoting page, one needs to build it your own.

If you do need assistance in building such site, don't hesitate in contact me... I usually give discounts to fellow S.O. users. :-P