Make one using one of the many terminal/station kits. AJS (Andi06) made a whole slew of invisible stations that will change the track to what you want to use. You then put your own splines over the places where the platforms go, and you're good to go.
That's what I do. Lay down multiple AJS station tracks (invisible) then run platform splines over them. They can make for some great looking terminals. You can also use station roof splines to cover the platforms to keep your passengers dry!