Yes, they're still the same on the outside. I've put a picture on my profile now (amongst the photos) of a doctored pumpkin one, and an undoctored custard one.
It will work just the same without the flap, but I can sew the flap back on in a matching thread if you prefer (I do patchwork, I sew nicely!). I could also do contrasting thread, or the pumpkin cut off section onto a white pop-in in the true spirit of patchwork!
This is what I have, and you can fight it out...
Doctored ones:
1 coconut
1 duck egg
2 pistachio (1 crinkly)
1 pumpkin
I totally hadn't thought of using the booster as a spare - it's dead obvious, because you don't need to change the wrap every time. But I have enough pop-ins.
I may also have 2 additional pumpkin ones (undoctored), and 2 pumpkin night boosters. They're the ones where the dye has faded in patches. Looks for all the world like they've met with bleach, but they haven't, it's a faulty batch of dyed bamboo. I can confirm about them when I hear from the company.