We have an ASP.Net application, done by a third-party, that uses third-party controls. The problem is that some of these controls don't work with anything higher than IE8. I have been asked to look into this and try to figure out a way to make them work again (the company is upgrading to IE11).

Unfortunately, the source code is not available; there are no code-behind that I can work on. And the controls are no longer supported.

One solution that I can think of is adding a new .aspx page and use inline code/javascript/code-behind to return the functionalities that are not working.

This is my question: is this feasible? Or are there any other ways that I can resolve this, short of replacing the application with a new one?