Train motor PF en PU

[Jaco van der Molen]

In the set I found a new style coupler assembly. One of the parts has the design ID 91968 printed and I did not find that in the library. So I suppose this also isn't modeled.

Can someone dig up the numbers for these parts?

EDIT: Also found another with "91966"
EDIT 2: I just remembered that Brickset exists: coupler assemblies are presumably 91992 and 91994
EDIT 3: Related part 18626 is also not modeled. This set is a gold mine...
EDIT 4: 18626 done

Thanks