Is this any help?

http://2009.bmwfans.info/parts/catalog/E30/2-doors/South_Africa/320i-M20/browse/sliding_roof_folding_top/baur_top_cabriolet-6/

http://2009.bmwfans.info/parts/catalog/E30/2-doors/South_Africa/320i-M20/browse/sliding_roof_folding_top/