I'll be back by Lex around the 6th if you still need some by then, but I'm on the other side of the state atm.
Substrate from an already established tank also works as a jump-starter if you have some, such as from your 20g.
I appreciate the offer!
However, I think my cycle is nearly complete at this point. I'm starting to see nitrates building up. It was the 20 gallon that I was cycling.