Lost alarm remote

[dr. d]

I recently lost my car alarm remote. Alarm system is aftermarket that was installed in my 1997 corolla gli. Is it possible to just purchase another blank remote and have it copy the installed alarm system? How much would it cost?

consider replacing the entire set.
it's not too expensive, if one gets the more basic models.
plus, you have a totally new set, and not a frankenstein of new and old.