I saw one of those and downloaded it, but can't do much with it.
Basically I like the PCB123 pricing for making a run of boards, ExpressPCB is less for small runs, but gets spendy quickly on larger ones.
I've gone ahead and just measured and drew pin holes in the design where the Teensy would be mounted, which should work ok.
Like anything else, you want cheap, easy and fast, but you can only pick 2.