Sorry dont know where you can get First Response Early Result, but I can second littlelou for Clearblue Easy Early too. I used the digital one and I got to know by week 5 (counted from first day of the recent cycle).
that's early enough i think considering, to have your HcG tested from a blood sample, clinics recommend waiting till week 5 or 6 to get accurate results?
Haven't seen the First Response Early Result, but the Life Pharmacy in Motor City has the Clear Blue Easy early response tests (both digital and non-digital). Good luck!