We would need to see the markup and CSS that it creates but in principle it is pretty simple.
The main thing will be to scope the CSS properly - in this case a stack like CSSBox is your friend as you can give it a class to scope all the Sketch classes within and avoid potential conflicts with the theme.
I’m not sure what you are exporting in terms of the element itself - is it an SVG (i.e. XML markup)? or something else. This will influence how you actually get it into your page.
If you want, you can email me (support [at] bigwhiteduck [dot] com ) the output of a simple test case and I’ll have a go at it for you. It may even be possible to make it into a little utility stack to ease the process of doing it multiple times.
Thank you for all your incredibly valuable input! I will def cook something up and send it to you. Just dl CSS Box I’ll give it a try. Would be totally amazing to create something that others also could use. Thanks again, this made my day!