I have a rather unexpected update regarding the unidentified 2018–2019 BAM elements.
I contacted LEGO directly through the contact form on the Danish LEGO website, explaining the historical research being carried out by the Eurobricks community and Wadapan’s Build a Minifigure project.
I asked whether they could provide any historical BAM inventories, information on earlier waves, or access to archived element records. Unfortunately, LEGO said that they were unable to provide a complete historical BAM inventory or access to their internal historical records and databases.
However, LEGO Customer Service did send me an attachment containing official images of the nine elements I had listed in my request.
The elements shown are:
6222216 / 88585 — Black — MINI UPPER PART NO. 1947
6255055 / 21019 — Earth Blue — MINI LOWER PART NO. 1656
6255075 / 49719 — Bright Blue — MINI LOWER PART NO. 1658
6255098 / 49741 — Black — MINI LOWER PART NO. 1661
6255956 / 49790 — Bright Yellow — MINI HEAD NO. 2831
6255959 / 49792 — Bright Yellow — MINI HEAD NO. 2833
6255965 / 49793 — Bright Yellow — MINI HEAD NO. 2834
6265014 / 54117 — Bright Yellow — MINI HEAD NO. 2899
6265020 / 54168 — Bright Yellow — MINI HEAD NO. 2900
These are therefore official LEGO images, supplied directly by LEGO Customer Service, so at least these nine elements now have a completely reliable visual reference.
Unfortunately, I mistakenly believed that these were all the remaining unidentified elements when I sent the request. I later realised that some other unresolved pieces had not been included. I may therefore have used up my best opportunity to obtain further images in the same correspondence.
Anyone still trying to identify the remaining elements could nevertheless consider contacting LEGO in the same way through the Danish website contact form, explaining the historical and cataloguing purpose of the request. LEGO may not be able or willing to provide complete wave inventories, but they were at least willing to supply individual element images.
Send me a DM if you want I can forward you official email
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