of course you did! and here it is:
amazingly, it seems to support both kana and kanji (if it doesn't have an image for any kanji, it seemingly converts it into kana automatically for you, or failing that just plonks a boring old modern typeface kanji right inside the text!)—i can't imagine how much of a slog it must have been to collect samples of printed type for this generator! what a fun little thing!!
just to give you a heads-up: the generated image is shareable via a link, but you can delete it by clicking the link labelled 画像の削除 in the middle of the text below the image after generation.
btw you should be able to use this app to convert the images into modern text data again
(translations and transcripts of images in alt text)