Sunvisor with garage door opener

Owners manual shows how to program door opener built into sunvisor. Since my SE does not have this, I assume this is standard on SEL. Wondering if this could be retrofitted just by buying a SEL visor? Probably picks up 12 v off the little lamp.

you have to change the entire visor. All you need is 12V power to make it work and its readily available in the roof harness. there are many threads on this topic. Just search.