After spending more time, I found this spreadsheet. which was helpful because it has links to the websites where I can purchase the parts. However, I still think it is difficult to build an openmanipulator using the current documentation alone because the part names used in the spreadsheet was different from ones mentioned in the “Assembly manual” pdf file. I also noticed that the part list from the spreadsheet and the part list in e-manual are different. Which one is the correct list?
If you are interested in improving the documentation, it would be great if you can provide a single, up-to-date part-list that contains the links to the online stores. Also, it would be great if you can match the part names used in the part-list and “Assembly manual”, so hobbyist like me could easily follow the instructions.