Retirement tax questions

TT generated form 8453/8949 since there is one transaction from the broker's 1099 (Box E) without a  purchase date or basis.  It only shows proceeds of  $1K.  Contacted the broker and their tax department without success.  

Will it suffice to send a copy of the broker statement to satisfy the requirement of mailing in 8453 and 8949?

I've just efiled my return.