It got mine from ebay when I was pg with DD. This is the same doppler. Different seller though.
Sonoline B Fetal heart doppler /Backlight LCD 3mhz+ gel FDA US Seller 1y warrnty | eBay
EDIT: Some of them have free shipping to the US...so look for those!
I had a loss at 8 weeks and always feel relieved once I pass that mark. Of course, this time, I didn't even test til I was 8 weeks.....LOL.
Congrats for passing your hurdle!