When you say the places you plan to look have been shut down, are you talking about some type of retailer or private breeder? Most pet shops I am aware of (not my choice to buy from most of them) are considered essential and are still open. I assume most private breeders would work out some way to get a snake to you and be within social distancing guide lines.
It also would be a good idea to post some pictures on here of your sett up, specifics on your temps, etc. It is a good idea, if you haven't done so already to get everything up and running as if the snake was in there to see how the temps and humidity hold. There are a lot of people on here who could help you make sure you have the right set up, the correct size hides, etc.