Adding UI components without the whole library

I am building a site that I want to use UI components in but I don’t want to import an entire library - just the UI item and its styling? I know how to add items when copying the entire CSS or library. Essentially this is for speed, I don’t want the bloated and antiquated bootstrap for example. Alternatively is it possible to only export the code that is used rather than the entire library?

It is painful to find in html and css for one item, is there a simple way that I can drag and drop any UI component with it’s CSS and HTML?

Are there any tools you recommend to easily grab any UI component on the web with all of the necessary code to then reuse in Pinegrow?