Hi Enrique,
You can always search in similar way using ITOB in Paquete. Usually 1st 4 characters of Exit are the Package. In case of doubt, you can put a starat the end like ITOB* . To increase search area even you can use ITO*.
See the pictures.
In both cases you get this result.
Also to know the Package related to a Transaction you can find it through SE93. Example: You want to search for User Exits related to IE01. Run SE93, Give IE01 value and click on Display. Inside you will be finding the Package. You can use this Package for searching the User-exits as explained above.
Jogeswara Rao K