Do any Typophiles out there know anything about the font HalAgenda?

It’s a variation on Agenda and a few letterforms have little differences from Agenda. I’ve had it for years and used it for a client project recently, now the client needs to purchase a licence but I can’t find any information online about it.

I’ve attached an upper and lower alphabet so you can see what I’m looking for.

Any help would be greatly appreciated.