aus "Club Tech Networking Tips Newsletter"

. . .

IBM offers three time synchronization utilities for OS/400 (V4R1M0 and
later): SNTP Client, SNTP Server, and NetClock. All three are
technically unsupported products - you buy then "as is." There are no
refunds and no free technical support.

. . .

The price is, roughly, US $540, $1080,
and $2160, for SNTP Client, SNTP Server, and NetClock, respectively.
You pay for these by purchasing IBM's Consult Line services in a two-,
four-, or eight-hour increment; IBM lists Consult Line pricing as
$270/hour, but that price may vary outside the U.S.