[6.3] Missing "portdowngrade"?

[Gilles]

Hello

	I need to downgrade a software from the Ports collection because
it's buggy on my hardware, but the "portdowngrade" utility doesn't
seem to exist in the 6.3 Ports:

=========
# cd /usr/ports/sysutils/portdowngrade
-bash: cd: /usr/ports/sysutils/portdowngrade: No such file or
directory
=========

Does it mean this utility isn't available for 6.3? Is there an
alternative?

Thank you.