Typical lead time for backorders

I’m planning to order 25 Au/Io pairs for a lab next quarter and just found out 18 are back ordered.

Does anyone know what the typical lead time is for back orders. I don’t actually need them until February. Should I be worried?

This would be a great question to send directly to SparkFun who I’m sure would be able to give a better specific answer.

Typically, backorders are short lived if they even happen.