Hello mate post this in the RS turbo section not the project section and you will get a few reply's.
For now i think burtons stock the weird sizes ford used to make up for shoddy blocks???? but if you want a steel crank i assume you have loads of money to waste and want good power.... so you will be going efi as well?
If thats true you may as well source a fiesta efi block with the cps hole and sort two problems in one.
Good luck
Rob,