You can either buy one from the Albion- and claim the loyalty points- which will entail you collecting the ticket from one of the windows at the ground when you arrive; or just pay on the gate, in which case you won't get the loyalty points.
I'd guess they wouldn't post one out now, so it would either be phone up and arrange to collect it from the Amex, or they'll send it up to Huddersfield for you, so you can pick it up from the ticket office there.
Give them a call tomorrow and find out.