Community-maintained archives often host these versions. A known directory for these files is often linked in the Mobile01 discussion thread or the Logout.hu forum .
TCL 50P6US 50吋4K 簡易使用心得分享(第33頁) - Mobile01 Download S586T02 LF1V628 part05 rar
This is the primary source for TCL firmware. Search the TCL Android TV or Thomson TV threads. You will likely find the "part05.rar" as part of a larger split archive. Community-maintained archives often host these versions
There are specific "TCL Android TV" update channels where users share the split RAR files directly. Important Installation Notes Download S586T02 LF1V628 part05 rar