I don't think that there is a an extension for this and I have no idea how salesforces works in terms of sending emails.
However, you can always create your own token table, then create your own token links via excel and import them into salesforce and send them this way.
Help us to help you!
Provide your LS version and where it is installed (own server, uni/employer, SaaS hosting, etc.).
Always provide a LSS file (not LSQ or LSG).
Note: I answer at this forum in my spare time, I'm not a LimeSurvey GmbH employee.
