So dristivad continued to remain in fifth ara almost fir one thousand years and was then lost

Yes, according to Jain tradition, Drishtivada, the 12th Anga, remained available in the 5th Ara for about 1,000 years and was then lost.

A small clarification:

• Shvetambar tradition generally holds that the Jain Agamas were gradually lost over time, and Drishtivada was the last one to disappear.
• Digambar tradition also accepts that the original full Agam knowledge is no longer available in its complete form.

So the basic idea is correct: Drishtivada survived into the 5th Ara for some time, and then it became unavailable.