I've just done a quick search, and there aren't as many VGA BIOSes on Xbins as I thought. However, everything you need is still available. There are a couple of pre-patched BIOSes, but more importantly there are patchers to allow you to convert any BIOS into a VGA BIOS (VGA_Patcher_v0.8.rar, Evox_M8plus_VGA_Patcher_v0.8_bugfix.rar), and they both come with simple instructions.
There's also a pile of BFM VGA BIOSes (Frostys_BFM_VGA_BIOS_Pack.rar), so you can test them with PBL before flashing.
The BIOSes to consider are iND-BIOS.5003 , Evox M8+, and X2.4981.