Get a used SFF office PC low profile card off Ebay. They often have chipset wattages around 25 or so and easily run on slot power only
Something like this: https://www.ebay.com/p/1958445856 (idea only, not endorsing this seller).
Anything of a semi modern format with a pcie interface thata not an outright scam card will be fine for VGA no-driver video output. IME older AMD/ATI cards seem to boot better than oder NVidia cards…
If it works, it works. Really any old cheap pcie card will work, if you just need video out of any kind the card type need not be specific. Glad you got it to work.