Need Help Finding an 1870s Corset Pattern

So other than the Ageless Pattern 1876 and the De Graciuse pattern sheet of insanity, are there any other specifically mid-1870s corset patterns out there? I like the shape on the Ageless Pattern, but I'm having a hard time finding any reviews on it. For those of you who have used multi-sized patterns from that company, what are they like?

Also, how on earth do you attempt to blow up something like the sheet from De Graciuse? I have a feeling that's a wormhole that I don't even want to attempt to open.

So what else is out there? I need something with the longer, curvier front, because the front of my bodice is defiinitely a cuirass-style bodice. I also really love the dramatic shaping in the picture for the Ageless Pattern one - I definitely don't want a straight panel (or even straight mixed with gussets) style corset - I feel like I want something more dramatic.

And finally, is there any way to really know how long of a busk I need for a corset style that I've never made before?