Agree with both of the above. Mk2s are definitely old skool by now, and they've got a decent following too. Plenty of people prefer the Mk2 XR2 over the Mk1 because it's a bit easier to live with day to day.
I'd say a general Fiesta thread is the safest way to start, and it'd show the admins whether there's enough interest for a proper section. If it takes off, a dedicated menu makes sense. If not, you've lost nothing. Might be worth posting one yourself, guido, since you raised it.