ancient11,
Finding common livebearers online should be easy even during COVID-19 restrictions and delays.
If the Wet Spot doesn’t have everything you need some reputable online vendors that carry most livebearers are Aquatic Arts, Blue Grass Aquatics, Flip Aquatics, Twin City Guppies, Michaels Fish Room, Imperial Tropicals and many others.
You have mentioned the high cost of shipping and yes that is true. Shipping live fish is costly as it is needs to be expedited. Typically this is about $29-$49 and might be free if you have a large order. If you have reservations about the shipping costs contact a local fish store. Two stores in my area are delivering any products including live fish during COVID-19 for free locally. Even if your store does not explicitly mention delivery, it doesn’t hurt to call them and explain your driving situation. If you throw an extra $10 an employee might stop by with some fish after the store closes.