RGH CORONA V4 with cr4 xl?

So im trying to find out what chips i need to rgh my corona v4 i was told to use the cr4 xl, however the damn qsb's for the coronas are no longer sold so how am i supposed rgh it without those? There are NO tutorials on doing it with just wires.

I would send it to someone but they all live in the usa and i would pay as much in shipping and rgh service to just buy a pre made rgh.


So Basicly WHAT CHIPS DO I USE TO RGH A CORONA V4!?