I bought similar items for 535 about 2 years ago. That was after buying something online from aftermarket supplier that I thought was right but turned out to be wrong.
You can get the aftermarket for cheaper and they do the job. Cannot recall who I used in the end but it does save time just buying the full part.
The cheapest option is to just buy the rubber seals but they can be slightly tricky to fit. (Youtube is your fiend as you can find several videos online on how to just change them)