Good day,
I have over 20 years of experience on design/development and I can build this website and configurator for you.
One of the best systems is WordPress, but there are others. To give you the best advice, I need some details about products and the website you need to build. For an example, the configurator may be select based from a menu or graphically built. It could have a few or many levels of selecting or even specifically configured for specific products.
For many reasons, I need to know more details, so I can give you the best suggestions and the best competitive bid. So till now, this bid is not final.
Thanks and best regards,