- 57482 - USB cable : Never created indeed.
- 61069 - Design Shell W. Ribs Ø4.85 : Official, Technic Panel Side Flaring Intake 4 x 6.5
- 85543 - V-Belt Ø15, White : Official, Rubber Belt Round 15 / 1.6 (but it needs to be shaped anyway)
- 13972 - Caterpillar Track : Exist as unofficial 53992c01 / c02 / c03 (different shapes)
- 61069 - Design Shell W. Ribs Ø4.85 : Official, Technic Panel Side Flaring Intake 4 x 6.5
- 85543 - V-Belt Ø15, White : Official, Rubber Belt Round 15 / 1.6 (but it needs to be shaped anyway)
- 13972 - Caterpillar Track : Exist as unofficial 53992c01 / c02 / c03 (different shapes)