Employer Change With Approved I-140 Tracking Number

[syedforimmi]

Hi Just wanted to know if someone is only having tracking number of I-140 Approval and he/she wants to change the employer to carry the same priority date of Jan-2004. Because, copy of Approval is not provided to the employees due to company policy.

Is I-140 petition number and copy of Labor Approval from the previous employer enough for the new employer to proceed with the filing in capturing the same priority date?

Any real time case or knowledge with be highly appreciated..