I, uhm, went on a pinning binge and bring you all a link to the results: [s]Romantic Era Clothing
The Fashion Institute of Technology (FIT) maintains a list
of online collections. This is everything I could pull from 1825-1835 (because Barricade Boys and their girlfriends are my general priority) from every collection they list where I could parse the search function with the exception of the Museo del Traje, which lets you download the entries in PDF but not link directly to them. I haven't been back through the V&A (this binge started with finding extant clothing and fabric patterns for a projected c. 1782 outfit), but will add their collection later.
Male, female, and accessories are all covered, with a combination of extant objects and fashion plates. I highly recommending clicking through to the stuff from Powerhouse in Oz - they've got really great information on the holdings that were donated to them.
This should save a lot of digging through archives - or give you a chance to do your own digging
ETA: I've had to split it for easier searching. I now have Romantic-Era Women's Fashion
and Romantic-Era Men's Fashion
. I've added V&A items and started adding lots of portraits from the period where they show good details of hairstyles, accessories, or daily dress.
What kind of literature and what kind of life is the same question. - Tom Stoppard