pjw´s request quickly resolved to a bigger amount of items.
A big thank you to pjw for testing again and again and again and to StunTMan for his help with blender (lights only).
All items were done in Mesh Modeller.
Instruction: unzip the downloaded file into your items folder (Trackmania\Items) and keep the folder structure or create an additional subdirectory named "iNDEX" and extract the ZIP-file here.
Intended folder structure for this item set: "Documents\Trackmania\Items\iNDEX\Modula1"
Addionally download the following item into the subdirectory "iNDEX" if you haven´t done it before.