Oh,, then when are they coming?

[flytothesky]

Hello~ Can you help me say this naturally please?
If my sentences are not natural, you can simply ignore them and give me your own sentence please.

A: Do you have mushrooms?

B: Oh, sorry, it is all sold out.

A: ⓐOh,, then when are they coming?
ⓑOh,, then when are they available?
ⓒOh,, then when can I buy the?

B: This week on Friday.

[konungursvia]

Sorry, they are sold out.

c. Oh, then when can I buy them?

Also, only one comma at a time.

[konungursvia]

Sorry, they are sold out.

c. Oh, then when can I buy them?

Also, only one comma at a time.