The Victorian era seems particularly popular for LARP settings, in part thanks to the popularity of the steampunk genre. They’re fairly frequent in theater LARPs in particular (and of course, I associate them with boffer LARPs because Lost Eidolons was the first boffer campaign I joined.)
A friend of mine, captainecchi, (an extremely talented seamstress and costumer) recently posted a long awaited treatise on bustles, with pictures and information on their history, construction, and tips for making your own (along with a bunch of useful links, including some really cool patterns.)
I’m looking forward to making use of this for a steampunk costume in progress. I’m a big fan of the dramatic shape of the bustle.