A contemporary of the FlickStand was a small plastic stepped and notched wedge made by Blackburn called, IIRC, the "Brake Block". You pulled your brake lever and inserted this wedge into the opening between the lever and body to hold the brake engaged. It didn't lock the steering the way the FlickStand did but it did keep the bike from rolling away. It weighed next to nothing and had a string loop so you could hang it on the lever body for convenient access.