Fetoscope..which one and where?

I don't have any recommendations on where to buy one (because I haven't made a purchase) but I know they sell the at allheart.com but they sure do make it hard to find with the search since every stethoscope is tagged fetal for some reason. But the page is here http://www.allheart.com/om13fetal.html

I have heard that you can't hear a HB with one until 20 weeks.

I got the $20 one at Allheart, I heard my baby consistently at 21 weeks.

The last two times I used a regular stethoscope that had a screw-on "infant" attachment (9.99 at a drugstore), and heard the heartbeat around 22 weeks. It worked just fine. I'll probably get a fetoscope this time since I haven't been able to find the stethoscope since we moved. Glad to hear they are affordable!

I also bought the ebay one. Heard the hb at 16 weeks.