The Integral 18 & 32 motor starters are discontinued ( obsolete ) now, the nearest correct substitute is Tesys U motor starter.
Please note that Tesys U is a customized product & one has to order following references as per the requirement

1) Power Base
2) Control Unit
3) Function modules/Communication modules/Auxillary contact modules
4) Auxillary contacts
5) Reverser block
6) Plug-in terminal blocks
7) Control circuit pre-wiring system

Cross reference guide for your reference and catalog TeSys U is attached below

To the product selector TeSys U motorstarters ( dutch version ) >>

Released for: Schneider Electric Netherlands