I found a decent suit pattern at Burda, so I went to Joann's to buy it. Of course they didn't have it, and the Vogue pattern number I'd written down a) didn't have a vest and b) only comes 3 sizes to an envelope. Poo.
So I perused the fabric a bit and happened upon this cotton bottomweight almost-twill that's in an appropriately garish shade of red (that won't look too horrible on me.) It was 6.99 a yard I think. 100% cotton! They had a 65/35 cotton/poly in an appropriate shade, but it had the nastiest texture. Then I got lining for the vest and coat, and a card of buttons for the vest.
I still need buttons for the coat and sleeves (though there are none in any of the art... I'm perplexed), and a wig (I saw one on the internet that might work). Possibly shoes, but I have a pair of women's black shoes that would do. I have a few yards of black cotton that I was going to use for the lining of my 1895 bodice, but I've decided only to to hem facings for that, except for the lapel part, so I should have sufficient extra. (Hm, I seem to have forgotten about the sleeves... well, I'll figure something out.) I also need a white button-down shirt and a jabot. I have fabric for a jabot, from when I never managed to finish my Balthier costume.
I've got the pattern on order, so I can start when it gets here.