Yes, space for UCO stormproof refill perhaps

https://www.ucogear.com/firestarting/matches/survival-stormproof-matches-10-pack-in-bag-mt--sv--bulk

There are small ferrorods made to replace the toothpick in Swiss Army knives.

https://tortoisegear.com/product-category/all-products/firefly-fire-starters/

Small but apparently work.