Well, having to find a 38" inseam is surely not one of my issues. It sounds like you have a long and lean physique, which of course, is perfect for tight fitting women's jeans. Is the inseam length as much of an issue if you wear your boots over the jeans? In other words, can you get away with a much shorter inseam if you wear the jeans inside the boots?
For me, I have just experimented with thrift shop girl jeans. I didn't want to spend big bucks not really knowing what size/length would be right for the old "dad bod". I found a pair of "lucky brand" dark blue "hayden" 12-31 stretch jeans that fit nicely. They are low rise, so it seems important having the old butt in decent form to keep them from drooping down, I just wear a belt. I have a dark grey pair of the same lucky jeans/same size, probably donated by the same person. I like these jeans because they stretch so fit fairly tight without feeling constricting. Definitely look nice with my nine west blank stiletto ankle boots, or most any boots for that matter.
A few years back, I ventured into the levis store in Vegas, looking for a pair of women's jeans. It seems like styles have changed, most women's jeans now seem to be "high rise", saw no real "low rise" styles. Not a fan of the high rise look though. My go to for years was always the levis 511s, they fit fairly nicely. Tried a pair of 510s years back also, had to face the fact that I am not 29 anymore. The sales person in the levis store was quite pleasant and helpful, I'm sure she realized she had a sale if she just stuck with me while I pondered several styles. Finally, she recommeded levis 512s. These seem to be a combination of 510s, nice tight fit on the legs, combined the a slightly more "dad bod" fit around the waist hips. I really like the way the fit and bought a pair, probably should have bought two pairs, they might be discontinued now!