Palstar used to make caps. Not sure if they still do.
MFJ sells them.
Dr Alex in Ukraine is still open, still shipping, and has split section and butterfly caps last time I checked. Takes about a month to get from him, but he's probably the best place to put your money if you can wait.
Ebay has caps. I've probably bought five hundred or more different caps, vac and air variable, through the last 20 plus years from ebay.
You can always get one slightly larger in Cmin and Cmax value and trim away some blade, if need be.
Many ways to skin this cat. Capacitors are available.
--Shane
WP2ASS / ex KD6VXI