Help for spare parts!!!

[Maurizio]

Hello everybody,
are writing a new to this forum, where I saw that there is very competent people, so I ask your help guys:
I began to lubricate the greasing points under the chassis of my H2, but I found that some rubber guards that cover the joints are damaged, and the grease comes out. I would like to replace these protections, but I'm not able to find the serial number of the part , so I can't buy them.
Can you, please, help me? I would like to do this job from myself: some mechanics that I consulted don't give me a good impression (H2 is not so common here).
Thanks all on advance
Maurizio