i know what you mean about the old stickers on mopeds. i think that the striped ones on your bike really accentuate the retrogression associated with peds in general.
i think that the stickers listed on ebay (honda, motobecane etc.) might say that the company has more designs in their description, or that they do custom jobs too. maybe if you cantact them via ebay messaging they will have what you're looking for.
another option is to paint the stripes on when you refinish the bike and put a different tomos sticker on top of that.
just a thought.....