Well, the news are not very good.
Linde in the catalogue, didn't consider the replacement contacts for this contactor.

Altghough, there may be a trick.

The contactor 7915691041 is for 36V Baxter (american version of Linde 324).
The contactor for Linde 324 - 48 V has the number 7915692516. Of course no contact set for this too in the catalogue.
I am not exactly sure, but the current difference is located rather in coil than contacts.

The issue is, that the same contactor 48V (7915692516) is used in Linde 113 truck. And here Linde offers the contact kit.

The number is 0029780521 for the contact set and
0009780522 for fixed contact.

I cannot guarantee, that the contactors have exactly the same contacts but it's worth checking with your supplier (ask them about some basic dimensions)