really liking this.
Give the Tab Collar shirt and Western shirts a look. I'm not sure about the western (don't own any) but my 2 tab collar shirts are fairly slim. 19th C. shirts are not slim nor tapered. The last few season the workshirts have been cut large so you could try sizing down. That being said if slim, tapered shirts are your thing I'd look to another brand. Gitman Brothers Vintage comes to mind.
Yeah I measured the waist of a recent 19th Century BD vs. an older work shirt and the measurements were the same. It could change from season to season though. The first thing I thought when I got a 19th Century BD was that it seemed baggy around the waist, but I got used to it and they are now one of my favorite shirts. I could recommend the Orslow work shirts, the 2 pocket ones like this if you are looking for slim.
If you get them from Japan they are almost 1/2 that price.