When I make bean bags I usually fill them with rice or lentils (whichever is less expensive in the bulk bins that day), and for sachets I generally go to our local co-op and buy bulk dried herbs/flowers to make whatever scent blend I have in mind.
But are you looking for something more specific? Like those little foam beads you find in some bean bags? Or an online source for bulk dried herbs/flowers?
I was thinking the styrofoam beads, but I like the lentil/rice idea MUCH better. I had not even thought of that
I was thinking of using Frontier for dried herbs/flowers, but was wondering there is a less expensive online source.
Beans are the classic "filler" but I find them to be too lumpy/heavy. The rice/lentils just seem to feel better in the hand. But experiment with what you have in the kitchen... you might find the perfect mix!
Hopefully someone will have a fav online supplier. I'm lucky that our local co-op has a great dried herb section. I'll confess to "cheating" a bit on some sachets I made once... I had gathered some herbs from my garden but didn't have enough to fill the bags I'd made. So I used tea bags. I think Frontier or another online herb shop would be a better choice, but if you ever find yourself needing a last minute "smelly" try the tea bag approach.
I use flaxseed. It seems to be denser per volume and therefore heavier than other fills. I bake it in the oven to keep it from sprouting, just 5 mins or so at 250* I love the way it feels in the bean bag and it seems to hold the EOs longer than other seed or beans.