Where can I find baby houseplants?

Looking to grow my collection from 1 snake plant (lol) and I've learnt that baby plants do well in a new environment than an adult ones. I got this snake plant from home depot but their houseplant collection is not consistent sometimes they don't have good plants. I'm only specifically looking for houseplants not outdoor or flowers that I can find in garden centres in the city.

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Another reason for buying baby plants is so i can repot them in my own mix so that i have the peace of mind that nothing comes with the soil from the store to my home and i would have more conrol over it.

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Tried fb marketplace but I dont see any latest post. Thanks in advance !