Either "There is no such need now" OR "There is not such a need now". Both are fine. The first is absolute - there is no need; the second is comparative - there may still be some kind of need.
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Cool BreezeHi Tanit
Your problem is easy to solve. You never say no + a:
I have no book.
I have not a book. / I haven't a book.
I don't have a book.
I haven't got