Based on this product's specifications, here are some alternatives and similar models
Purmo RE-V33/511 L radiator panel RE-V33/511 L
Summary description:
Purmo RE-V33/511 L is a panel radiator designed for central heating systems. It provides convective and radiant heat distribution typical for panel radiators. Intended for wall mounting in residential or commercial interiors, it connects to standard heating pipework. Suitable for replacing or installing heating panels where compact, flat-panel heating is required.