Hi @kukiteddy
Here’s a link to the [guide|40562] guide.
Here’s a link to just one [https://www.aliexpress.com/item/NEW-Digital-Camera-Replacement-Repair-Parts-For-SAMSUNG-ST77-DV300F-DV300-MV900-Lens-Zoom-Unit-Choose/32318577447.html|supplier] of a lens zoom unit. It is just shown to give you an idea of the cost of the part. There may be other suppliers online that will suit you better. Just search for ''Samsung DV300F lens unit'' to get results for suppliers of the part.
Hopefully this is of some help.