Giving Love Letter as a gift this Christmas and realized I had some ready-made substitutes for the token of affection cubes: stamina tokens from Arkham Horror.
(I use investigator player mats with slider tracks for managing Sanity and Stamina levels, leaving with me with many leftover tokens.)
Just wanted to share this fortuitous realization!
N.B. I take no responsibility for any possible malignant effects caused by adding some Arkham Horror to Love Letter. Nor do I accept any responsibility for whatever your dirty little minds come up with when you imagine precisely what is going on when stamina tokens are being used to measure the princess's affections.