window gasket questions

I've got some appearance issues with my '65 Barracuda in terms of the front and rear window gaskets. The chrome strip is all gone - so there's just a whitish looking plastic strip there now. Can one buy and replace just thhat strip (I think it's an expander or something like that)? Or do you need the whole deal and to pull the windows to replace that? Also on the back glass.. that big chrome trim with the valiant emblem... The seal for that - is it part of that window gasket or a seperate part? Mine's not leaking but is dryrotted and looks like poop.
Any help from more experienced is appreciated!