I need to get a drive belt and pulleys for my XJ-540. My dealer quoted over $1200 for parts and to change them out. I can install everything myself and so far I think I found the needed parts for under $250. The only thing is how do I know they are OEM? They say OEM but they also say manufactured by Ving. Does anyone have or know the part numbers for the drive belt and pulleys from Roland. Also anyone recommend where to buy Roland parts?....... I think my dealer really wants me to buy a new printer.