Softball Shirts?

Softball rules state that while we are not required to have matching shirts, we must have a distinguishable number on our shirts. I was thinking about getting matching shirts anyway. We have a couple of options:

1. Go to Walmart/Target and buy a bunch of plain T's and just iron on numbers or Sharpie the numbers on.
2. Get in touch with a screen printing company (which I've e-mailed two for a price quote) and just buy a plain shirt (or two-color baseball style shirt) and just have them put numbers on the back. One company (www.customink.com) was about $10/shirt and $2.50 for the numbers. (Names are an add'l $4.50)
3. Vote >>>>>>>
   

What are everyone's thoughts on these? We still need a team name by Monday. We don't need a roster or colors until game 1. The head of the softball leagues said that it is $600/team and we play 12 games from June 1 -August 21. So for the Friday games, we're looking at the first game being June 5.