I do love a traditional paper advent calendar. But they are expensive - £6-10 ish for one whereas your chocolate ones from the supermarket etc are £2 upwards.
Places I have found them:
Calendar club
John Lewis
www.traditionaladventcalendars.co.uk
www.papertiger.co.uk/
www.thecollectorscompany.com/
Would love to see if anyone has found other sources - I am in danger of repeating previous years' designs!