Since 60 of you are going why don't you book a coach itself. You will have to pay for 72 persons but you will have a full coach for yourself. Since JU is a division visit divisional office and enquire same.
PROCEDURE OF BOOKING
Five Simple Steps to book a Special Train/Coach

1)Register...
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Yourself by paying Rs. 50,000 per coach by cash to the Station Manager of the journey commencing station or Demand Draft in favour of Chief Cashier,Western Railway ,Churchgate at Cash Office Churchgate as registration cum security charges. [ At least 18 coaches would have to be booked for a special train. Hence a minimum of Rs. 9,00,000 shall have to be paid as registration cum security charges for booking of a special train." An enhanced security cum registration fee Rs.10,000/-(Ten thousand only) per coach per day for programme exceeding 7 days.

2)Submit an Application in the prescribed format to the Chief Passenger Transportation Manager of the Railway on which your journey commences at least 30 days in advance or a maximum of six months prior to the commencement of the journey. Attach Xerox of the money receipt obtained by paying registration fees.(Application Proforma can be downloaded from the Western Railways website at http:// www.wr.indianrail.gov.in)

3)Await Acknowledgement which shall indicate your position on the waiting list. Final Programme will be confirmed only after examining operational feasibility and haulage confirmation from other concerned Railways.

4)Collect Final Confirmed Programme copy and folder from the office of the Chief Passenger Transportation Manager at least 72 hours before the date of commencement of journey.

5) Approach the Station manager of the journey commencing station with full list and details of intending passengers at least 48 hours in advance for preparation of your ticket

this is for WR. visit JU divisional office and get details