How to load CSS and JS files when pulling blocks from another page

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I'm loading blocks from another page into a template file within my theme. These blocks are using a custom template I created. This works great, however, the CSS and JS files included with the custom block template do not load. Is there any way to do this without doing so in a controller (via addHeaderItem()) ? If the only way IS to do this through a controller - what is the best way to do this within a theme template file (or within a helper being loaded within the template file)?

Thanks so much!

stephendmalloy