I talked to Evans Tempcon, who makes the dash heater / AC unit. For parts, they recommended Comfort Air Inc. in Grand Rapids, MI. Comfort Air did have all the Goodyear hose fittings and hose that I needed. Their website is
Comfort Air, Inc. Home Page
To replace the compressor end of the Goodyear 3/4 inch ID suction hose on my 2006 TS DS04 400 Cummings, I needed:
BL012119, ¾” thin wall Goodyear barrier hose
RV218669 ¾” hose splice
RV218728, 90D fitting, compressor end
Accoring to Evans Tempcon, these fittings can be crimped with any #12 crimp machine, even one designed for Gates hoses.
Hope this helps others in the future.
Tom