Your CEO's current business card and contact details is good enought. But ensure giving a cover letter that will say that your previous company has been shut down and so you are getting the reference letter from the then CEO's with his current designation and occupation, and contact details.
Sample Letter: YOU MODIFY AND CUSTOMIZE ACCORDING TO YOUR NEED AND UNDERSTANDING
To Whom It May Concern
This is to certify that Mr. siryasir was an permanent full time employee of the COMPANY_NAME as DESIGNATION from DD/MM/YYYY to DD/MM/YYYY. He played a significant roles as "NOC DESCRIPTION" encompasing "describe 2-liner that match the lead statement of your NOC".
The following table shows the chronological roles and responsibilities of Mr. SIRYASIR at COMPANY NAME:
Company:Company Name Position: YOUR DESIGNATION PERIOD: From ...TO DURATION
Role playing as "NOC DESCRIPTION"
:
:
Annual Salary and Benefit: RS XXXXXX per month
Number of Hours Works: Full time job, 8 and half hours per day, and 5-day a week;
Company:Company Name Position: YOUR DESIGNATION PERIOD: From ...TO DURATION
Role playing as "NOC DESCRIPTION"
:
:
Annual Salary and Benefit: RS XXXXXX per month
Number of Hours Works: Full time job, 8 and half hours per day, and 5-day a week;
Yours Sincerely,
NAME OF CEO
CEO
E-MAIL ADDRESS
CONTACT NUMBER