Is the club only for limited figures, or for any kind of limited good as well?
If the latter, there's a few telephone cards that can be added to the Related Items list:
* All the telecards in that collection: encyclopedia #58714
* item #192044
* item #192045
* item #192021
* item #192022
* item #192023
All of those are limited, and come with a serial number.
Also, there's this figure: item #183392. Limited to 1000 pieces.
Thanks in advance for your attention!