I got this:
https://www.amazon.com/gp/product/B0006O1QQC/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
I assume you can also use this is your LHS carries it.
https://www.hobbytown.com/arrma-typhon-3s-blx-servo-saver-set-25t-ara340151/p786307
https://www.amazon.com/gp/product/B0006O1QQC/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
I assume you can also use this is your LHS carries it.
https://www.hobbytown.com/arrma-typhon-3s-blx-servo-saver-set-25t-ara340151/p786307