Your search for "knotty thread tamer" revealed the following:

Wonderfil - SoftLoc Wooly Poly - Serger Thread

$6.00 CAD $8.00 CAD

Milward - Easy Threader - Flexible Needle

$5.75 CAD

Milward - Looper + Needle Threader

$7.25 CAD

Wonderfil - Konfetti Cotton Thread - 200m

$4.40 CAD

GUTERMANN - Extra Strong- 100m - Assorted

$5.25 CAD

Wonderfil - Serger Combo Pack - Assorted

$23.00 CAD

Hook & Loop Tape - Sew On - 19mm - Assorted

$3.75 CAD

Hook & Loop Tape - Sew On - 25mm - Assorted

$4.25 CAD

Bamboo Cotton - Rib - 2x2 - Assorted

$19.50 CAD

Milward - Needle Threader - Hummingbird with Cutter

$5.75 CAD