I am pleased my research seems to have located information on your friend.
Here is my original information reposted as the answer.
This might be who you are seeking. The birthdate would make him 18 in
1944. You might call or email his sons to see:
"...rigfinder.com?s founder, Jim Sapp, is the son of Ray Sapp
(1926-1995). Ray and his brothers started a number of
companies?including Sapp Bros. Truck Stops, auto and truck
dealerships, financial services businesses, and petroleum distribution
companies?during the 1960s and 70s. One of the companies Ray developed
in the 1970s was Sapp Bros. DBR Leasing, which specialized in leasing
equipment, automobiles, and tractor-trailers.
In late 1999, Jim developed rigfinder.com as a spin-off of Sapp Bros.
DBR Leasing. Rigfinder.com was originally designed to match
independent owner-operators with truck leases from Sapp Bros. DBR
Leasing. This year, we re-launched rigfinder.com as a matchmaking
service, based on the financial advantages of vehicle lease transfers.
For more information, contact Jim Sapp at 317.570.5436,
firstname.lastname@example.org or visit www.rigfinder.com..."
A little more:
"...My father, Ray Sapp (1926-1995), was the eldest of seven siblings.
After he completed his tour of duty in the Korean conflict, he worked
for Prudential Insurance in Nebraska and he and my mom, Lenora,
started a family. Soon they had three sons and a daughter..."