Hat Advice!

So, I am starting to stress about all the sewing I need to get done before Williamsburg, which is in, uh, a few weeks?  I don’t know, I don’t want to look at a calendar.  I think I can get it done in time… but there are lots of things to do!  Gotta make my 1780s stays wearable, finish my Brunswick, and bang out a riding habit — it can be done!

I’m starting to stress about a hat for the riding habit (and possibly the Brunswick?  dunno).  I want to do a black hat with tons of feathers like you see in the fashion plates, but it’s hard to see exactly what is going on there under all the feathers… and I don’t have a lot of time!

So, this brings me to my question — is it doable to get a black wool hat on Etsy/Ebay and reblock it (steam/wet it and dry it over a form)?  From what I can tell, it looks like the hats are big enough to go over the (low) wigs, which means a waaay bigger headsize than anything I’m going to find.  And I just don’t have time to really make a hat from scratch, so I’m thinking get something with a decent size brim, reblock the crown, mess with the brim, and stick a lot of feathers on it.  Does this make sense?  Am I on the right track?