Yup, that's it, awesome! Are there slovak/czech seed companies that would ship to the US? Searching google for kveta squash/marrow brings up a few international seed companies, but I've no idea how to tell if they are reputable. I found this company, for example:
https://gardenseedsmarket.com/marrow-kveta.html
However, reviews of the company are kind of bad.
Hmmm.