There are a few options for your 2000 International 4900 Truck, but there is not a custom fit receiver available.
The Super Titan 4000 Weld-On Trailer Hitch with 3" Receiver Opening, 25,000 lbs. # 38124 could work but requires the frame on your truck to be 34 to 34-1/2" wide. This option has a 4000lb tongue weight rating and a 25000lb trailer weight rating, but uses the less common 3" receiver.
Another option is the Curt Class 5 Universal Weld-on Hitch w/ Brackets - 2-1/2" Receiver -... view full answer...