Based on this product's specifications, here are some alternatives and similar models
Replacement Spring for THP1300 model YTHP13SP by No name
Summary description:
Spare/replacement spring designed for THP1300 units, model YTHP13SP (MPN YTHP13SP, EAN 5903755063168). Intended as a direct fit component for maintenance or repair of compatible THP1300 devices. Use to restore tension or functionality where the original spring is worn or damaged. Suitable for repair shops and DIY servicing of the specified model.