Introduction
The best SMA905 option found so far are from [Shenzhen Xinrui Optical Co., Ltd.] (via Alibaba.com).
https://www.alibaba.com/product-detail/Metal-SMA905-FC-PC-Fiber-Optic_62174938237.html
13 USD per piece.
And the fibre cable to go along:
https://www.alibaba.com/product-detail/SMA905-For-spectrum-detection-optical-fiber_60772592518.html
31 USD per piece
Cheaper alterantive
fibre cable:
https://www.alibaba.com/product-detail/Fiber-Optic-Cable-JFOPT-Wholesale-Finished_1600234860719.html?spm=a2700.galleryofferlist.normal_offer.d_title.52752320n5XDT5&s=p
https://www.alibaba.com/product-detail/holmium-fibra-yag-sma-905-FC_1600232076685.html?spm=a2700.galleryofferlist.normal_offer.d_image.7e5844dfX50kwR
10 USD
female
https://www.alibaba.com/product-detail/SMA-905-Adapter-Fiber-Optical-Adaptor_60816218817.html?spm=a2700.galleryofferlist.normal_offer.d_image.68344f483OCobp
4 usd