I'm sure you can order [ or find used ] collars to fit your unit [ if you still have it ] just go to the garmin/tri-tronics web site and they should have everything you need .
Agreed, they should still offer just the collars.
Iv got a 2 dog and 3 dog dt systems. It goes from 1-15 with nick n continuous, but cont. shuts down after 5sec n u hav to turn the collar off and back on, and if u press the nick 5x in a row rapidly, it shuts down too. Setting 15 will dang near make them drop to their knees.
