Based on this product's specifications, here are some alternatives and similar models
Nozzle for plaster GRACO HDA631 1050636 – replacement plastering nozzle
Summary description:
Replacement plaster nozzle for GRACO HDA631 (MPN 1050636). Designed for use with GRACO HDA series plastering equipment, this nozzle directs mixed plaster or rendering material during application. Suitable for professional and DIY plastering tasks, it ensures controlled material flow and consistent coverage when attached to compatible GRACO spraying or dispensing tools.