Contact the seller via Amazon, AliExpress, or eBay. Most provide a Google Drive link to the driver. Alternatively, search for “LK 6018 driver download” on the Munbyn support page (Munbyn printers often use identical electronics).
LKT Tattoo Transfer Copier Printer Machine Thermal Mini Printer Mobile LK-6018X. Free Thermal Printer Drivers — ESC/POS, Epson, Xprinter Thermal Printer Mobile Lk 6018 Driver Download