EXAGE 300LX (RD-M300) replacement options compatible with original shifters? : r/bikewrench
Amazon.com : V-Brake ST EF500 Set, Brake/Shift Lever with Brake Cable, 7- Speed Gearshift Brake Combination with Gear Indicator, The Upgrade of EF 51, Black (3 × 7 Gears) : Sports & Outdoors