Reg PCB to Existing Custom PCB - 30 ads
Reg PCB to non-Existing Custom PCB - 40 ads
And the waiting time suppose to be 2 days
If you plan to change your reg PCB to Custom PCB, my advice is, try to sell your reg PCB and buy any Custom PCB with reasonable price.
Then change your desire custom PCB from your current custom PCB with cost only 5 ads (existing one, non-existing should cost 15 ads)