PC-88 VA BIOS for 88VA Eternal Grafx

I just learned there are a few emulators for the PC-88 VA, the only 16-bit computer in the PC-88 series. It's a system (subsystem?) I've wanted to try for a while, but I can't find the proper BIOS files for the emulator 88VA Eternal Grafx. And it seems that my emulation options are either this emulator or its evolved versions, so...

Can anyone help?