Haftarah when there is no kosher scroll

We have an ancient Torah scroll that is not kosher and has large sections missing, but we do not currently have another scroll in the city, and we are in the middle of a fundraising campaign. The question is, until we have a kosher scroll, can we at least bless the Haftarah, since it is customary to bless even on a printed Chumash or Tanach?

Shalom and blessings. I wish you success in writing a Torah scroll soon, but until then, you should not bless the Haftarah.

Shulchan Aruch (Orach Chaim, Siman 284, סעיף 1) Biur Halacha (ד"ה אסור).

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