Home Depot has these cheap saucers. I like them for my 1g and my tiny 2\3 solo cup pots.
They're great because they allow the roots to form at the holes so it's easier to tell when transplant is ok and rootball is better formed all the way to the bottom.
I also like them better because the green saucers are bigger than the 1g pot making it harder to pack plants in close together.
Another feature is that depending on the size of the 1g, the pot will sit a bit high in the saucer because the lip of the saucer is just a bit too small, suspending the pot out of any runoff.
The final feature is the suspended pot can be adjusted to be vertically plumb if the surface it is on is not flat.