BMW E28 - Emblem M-Technik - Schmiedmann - Neuteil

Genuine BMW M Technic Door Molding Emblem Pair – MSportParts

BMW E28 - Exhaust-system and mounting-parts - Schmiedmann - New parts

szacsi72's E28 535i build thread - The Reddie

BMW E28 - Emblems for gear knob - Schmiedmann - New parts

BMW & MINI parts styling tuning new and used parts - Schmiedmann - New parts

There are several mounting options, since the emblem is flat. The emblems in the photos are attached with double-sided tape.

BMW E30 - BMW M TECHNIC emblem

BMW E28 - Frontstoßstange Klappe Abschleppöse/Halter/Klammer usw. - Schmiedmann - Neuteil

BMW E28 - Sport-Endschalldämpfer Eisenmann/Supersprint/Hartge usw. - Schmiedmann - Neuteil

BMW E28 - Emblems M-Technik - Schmiedmann - New parts