215 is about as narrow as you'll find in any truck tire these days, except maybe for s few hard to get oddball LT sizes in 195 and 205 for 15" wheels for the panel version of the Dodge Caravan.
The 8.75R16.5 isn't necessarily old, but it is obsolete as far as a common truck tire size. It's almost impossible to get a 16.5 tire anywhere without special ordering it anymore.
