Hi,
I can help creating the tool to your website. Have done similar custom tools for companies before, with Javascript, PHP and Python. Your PDF was very clear (big thank you for that) so not many questions in mind. If you can share any info about the website where the applet will be included (e.g. is it Wordpress site?) that's of course always helpful.
I made a quick reference script for you if you want to verify that this is actual bid, not an auto-reply: [login to view URL] Note! Just few lines of code, your final version would obviously include user-interface, matrix grid, file saving and all other functions listed on PDF. Will also help integrating tool to your site if needed.
Thanks for looking and best of luck with the project. Am available in chat if you want to talk more about the details.
With respect,