Where can I play this game on the Internet?

There are many on-line communities, where cribbage is played, and if you can find an opponent who knows about lowball, you don't need anything else.

If you want to join an organised lowball cribbage community, join one (or all) of the lowball ladders.  For information on these ladders, click on either the "Pegless",  "Loserswin" or "Woodys"  link, on the left hand side.

There are other regular crib ladders, which have lowball tournaments.  For example... www.laddermonkey.net (which plays their games in Yahoo! games), have a cribbage ladder, which includes lowball tourneys.