Need to flashing 37542F device without E8a.

Hi, everyone!

I have device board with 37542F(740 Family) and need to flash it without E8a programmer/

Unfortunately , do not have E8a programmer/emulator.
I think that my device have standart bootloader from factory.
Which software can to communicate with bootloader via UART or program it in  Parallel mode?
For example, i can use standart or USB2COM adapter.