This part is discontinued and is no longer available.
However, for part MA53500: MGTS282H2R is a potential alternative. This lock is a close replacement. It features mushrooms, rather than rollers, so keeps will need to be changed, but they are in the same positions. Hooks are in slightly different positions, so hook keeps will need to be adjusted by 20mm or so.
For part MA53501: MGTS352H2R is a potential alternative. This lock is a close replacement. It features mushrooms, rather than rollers, so keeps will need to be changed, but they are in the same positions. Hooks are in slightly different positions, so hook keeps will need to be adjusted by 20mm or so.
For part MA53503: V-MPLSS45 is a potential alternative. Maco have discontinued this product. The VERSA is the next best replacement.