I have been using the NAPA 1809 for years on my Bighorn.
Here are some parts I have been able to buy locally (in BC, Canada)
Alternator-water pump belt: NAPA 25-22405. This is a nice fat 17mm belt.
Alternative: Good Year Hi-Miler 22404 (15x1015mm)

Aircon-P/S belts:
Good Year Gatorback
13AV1525
17601 Matchmaker

Alternator parts:
Voltage Regulator: Transpo IH252
Diode Assembly: Renard 31-8133 (also says 2964 Wetherill Associates Inc on the box)

Valve cover gasket: 8973494161 This is indeed the correct one and available from Klassen Diesel $30 a shot!


Fuel Filter NAPA GOLD 3128