Sorry, but in a word, no. 187 ml bottles are made for the wine industry and they only come in clear or green. If they are available they are beyond my Google-fu.
But there is a non-traditional amber 8oz or 4oz alternative from herbal medicine manufacturers that go for about a $1.00 to $1.35 per. They should do the job for you, even if they are a little odd. I don't know anything else about these bottles, I have never used them myself. My only concern would be their thickness in respect to withstanding carbonation pressures. It probably wouldn't be a problem and they are cheap enough to order a few and give them a try.
Personally, I would just short-fill a couple of regular bottles and CO2 purge them.