Actually, I've been doing a fair bit of sewing. I have about 2/3 of the trim on the commission at this point, and I managed to make myself a new spencer after all!
Last Sunday, the night before I left on a work trip for Las Vegas, I mocked up a sleeveless spencer (based on the pattern I used for the back and under-part of my bib-front dress, with the front altered into more of a deep v). Then I cut it out of some red velvet I had laying around, and flatlined it with some leftover ivory silk. I sewed the five pieces together by machine, and sewed one side of the binding down around all the edges. Then I threw it, some trim, and my handsewing kit in my bag for Vegas. I whipped all the bias down, and added trim around the neckline, and was able to wear it Sunday night for the Regency ball!