They don't come with them in the US or Canada either.
I just took it out of the Dell and put it in a Xerox and it slots in perfectly.
I saw no reference to the part on Dells website either.
The R10 is an odor filter. I can't find a part number but will try and get one. There are no part numbers on it. I have one in one of the machines but it came with the printer so no box to get a part number off of.
Looks like this:
Hello Support Forum
i got a little question on all mfc's 74xx 75xx 78xx 7120 7220 there's on the left back side a little door with R10 on it
it look's like you could install a fuser filter there but i can't find any information where to get one or any partnumber for it
maybe someone here got an advice