I had this need to buy a car 1000 cc on installment with out bank. What are my options?

Do you guys knows any Car Garage Owner, who revamps or redo cars in rawalpindi? Or any other Sale Point Service which can help in this regard?

I have asked people, and they have said, some people might agree to sell it, in one year installment which is perfect for me, 50K per month or so..