Areas/Tors whre old boxes are still present

Anybody know of Tors/Areas on the moor (of course more deeper in the moor) where it is likely to find old letterboxes dating prior to year 2000?
Areas where I do not have to search for boxes amongst 100000 clitterpieces.

You could have a stroll out to Cut Hill - plenty of older boxes up there hidden in the peat banks - definately no clitter. Also Amicombe Hill should house a few old ones, but you would be very lucky to find them