I think the Jaller lookalikes were probably just a case of reusing assets to save time, but it’s possible that some of the other Matoran were built from real pieces we haven’t seen. Like maybe the early “George” Takua ?
Also, thanks to KDNX’s topic, I realized I mistakenly gave Gali the wrong mask. The one listed in Aanchir’s spreadsheet was actually an Akaku.
Seeing them all together like this, it seems strangely fitting.