I spent last weekend (with lots of breaks) making a custom fit window shade:
It was a lot of work (all hand stitched), but it's so much nicer to have something that fits and blocks out virtually all the light. It's noticeably cooler than the nearest off the shelf size which was good for height, but about 150mm too narrow.
Now with matching road bike:
It's an Italian Kuota brand frame with my old Di2 etc components. I love the new frame, it handles far better and is far more comfortable than the pro level frame it replaces. Doesn't look as good though
I've added a new saddle, light weight battery (ditched the heavy Shimano battery mount and bottom junction box) Still waiting on a new handlebar and maybe stem. My luggage scale is broken so no weight as yet. Already averaging 24km/h which is not that much slower than the van, and within 2km/h of my old van.