Redirect to another page in custom request event handler

I'm trying to mimic the Application_BeginRequest in a non-MVC Kentico setup, and have a custom handler module loader with a RequestEvents.Begin.Execute method. Depending on a particular condition, I want to redirect the user, but the Response object is not available (for Response.Redirect(...)). HttpContext is also not available.

The first parameter of the RequestEvents method is a CMS.Base.SimpleHandler, and there's nothing there that seems to fit the bill either. Second parameter is the base EventArgs which doesn't help either.