I make my own. I buy a bag of smaller sized plastic ties and a roll of surgical tape. The wide, brown, 3-M tape has worked the best for me. I had to experiment with the ties at first to find a the right rigidness, now I buy the 150x3.3mm. I cut the plastic ties into 5cm pieces, getting two from each tie. I wrap the 5cm piece with a 5cm piece of surgical tape, then cut a longer piece of surgical tape, not sure how long exactly, 7-8cm I’d guess. I then put the 5cm piece in the middle of the sticky side of the longer piece of tape and wrap it around my nose. I’ve been doing this to sleep for six or seven years now. My only complaint is that sometimes I forget that it is there and have to take it off in a hurry and it brings some skin with it.