The "2Y" is the key, and it's not Parchment, it's Nugget Gold. You still need the same answer to the paint;
Dark Nugget Gold, code 5799 - instrument panel pad retainer, defroster louvers, rear window molding;
Light Nugget Gold, code 5800 - instrument panel, steering column, quarter panel moldings, door metal surfaces, console.
The paint is available from most Mustang stores. Seat covers are available in Nugget Gold, but I don't know what color the carpet would be (only Ivy Gold is offered) or the dash pad (again only Ivy Gold is offered).