hifi engine

Technics SL-PD627

YI am looking for a place I can find a list of parts and where they belong as my lovely kids did not break the part however where they got it from is beyond myself. Therefore if anyone would or could me a site or a list of where i could find where this part belongs or may even have one of these at home would great it is a white piece and has RMRO549 on the longer rectangular part of this mold It maybe that the number is not O it is 0 so would read RMR0549 and if you would like I have video and pictures of this part and I would very much appreciate it. Thanks for all the wonderful help every one.