CurrentPage points to the current page in CMS, since products do not have CMS-pages you get the StartPage.
The accelerator has added a route that let you access controllers using site.axd
so you should be able to write a url using that pattern:
RouteTable.Routes.MapRoute(
"ControllerDirect", // Route name
"site.axd/{controller}/{action}/{id}", // URL with parameters
new {action = "Index", id = UrlParameter.Optional} // Parameter defaults
).DataTokens["SkipAutoLayout"] = true;
From Litium.Accelerator.MVC/App_Start/RouteConfig.cs