Dear Sir Amrit Karki, The materials can be supplied by each manufacturer of plastic as long as your project and country allow it. Manufacturers of ABS and PET are like: Zerz, Igus, Polimekar and others. http://www.isternplastics.com/resins.html https://www.curbellplastics.com/Research-Solutions/Materials?buttonclick=pdf Pleasant and controversial scientific work With respect Emil Yankov
Dear M.Sc Amrit Karki, Have you thought work with recycled PET? An excellent PET source is bottle (water, soda, etc) a common waste from alimentice industry.