Hi, If Unit 1 is already covered under PF, you can use the same for Unit 2 as well. There may also be some online provisions available, though I am not sure if they are operational. You can try contacting the existing PF office PRO for further clarification.
Online Registration of Establishments (OLRE) Portal
The Employees' Provident Fund Organisation has launched the Online Registration of Establishments (OLRE) Portal for the allotment of the PF Code number. Employers seeking an Online Code can contact the toll-free number 1800118005 between 09:45 AM to 05:15 PM on any working day for any queries regarding this process.