@23n27 this actually differs from project to project. The multi color printed natural aluminium colored face plate were likely from panel-pool. Plain natural colored aluminum ones likely laserteil24, and black anodized ones com from one of 3 suppliers and then go to Fischer Oberflächentechnik for anodizing... Haven't really found a one stop place yet. We plan to put many of the osmocom bgt modules up for sale in the @sysmocom webshop soon [TM].