I've recently (a year ago) started making corsets.
I got the course and patterns from this website.http://www.corsettraining.net/
I love making them. Supplies are a bit of a pain. I always use steel boning. They are fairly easy to construct and adjust.
I have some with the traditional busks, but find a metal zipper with boning on each side looks nice too and is much easier to do up.
This my Walking Dead corset and another waist cincher corset I made.
But it's too small for me. I embroidered a design from Urban Threads on the front.