Onda VX858LE have 2 version V1 & V2 ... V2 is the one you have ... V1 have two firmwares 01.00.0032 and 01.00.0040... you can find this versions here
FTP Onda.
Different version are due to changes in hardware but minor components, it have nothing to do with Rockchip processor, so there is no risk except that you could get some undesirable noises.
There is no doubt that your player is V2 by the number of firmware.
I visit frequently Onda BBS (I don't speak Chinese) if I found some firmware for your version I will post it here.