Some Help With Customs?

I've finally created a checklist for collecting certain characters for my Thomas and Friends collection, and I even plan on making a few characters that haven't had Plarail or Trackmaster models from other models. I'm wondering if anyone knows any Plarail or Trackmaster trains suitable for making Pip and Emma, Bear, Barry, Derek, Daisy, and Logan. Logan I may make last of all my engines, as I may resort to making a small, unmotorized one with a 3D printer. For Daisy, I may just use Boco or Harvey's coach (like Z.M. Production's Daisy being made from Harvey's coach).