white spelt bread

Hello I am not so sure vif this fits here but if not please forgive me. 

I have been asked to make a spelt bread for someone who says she would like to have spelt in stead of rye.To date i hve only mixed white and spelt flour to make some bread.. I have white spelt four and is keen to use it for this trail . What i do not know or have is a formula for a white spelt  sourdough bread. Can anyone please help.

Thank you in anticipation.

Albert