Is there a way to convert a score field value to a string value, and use that value as part of an email address?

I have a need to generate an email address which has a numeric value at the end (before the @).    I will be incrementing that value, based on how many input requests are being sent to me (from the same partner).

Example:

RegistrationWebinarXX@partner.com

where XX can be an incremented value (01, 02, ..., 99).

RegistrationWebinar01@partner.com
RegistrationWebinar02@partner.com
etc.

How can the string "RegistrationWebinar" + "XX" + "@partner.com" be created and stored in a custom Marketo field?

Thanks for any advice.


Don