これとかどうよ
カナル型アマ最安
https://www.amazon.co.jp/gp/aw/d/B001T9OBEW/ref=pd_aw_fbt_23_2?ie=UTF8&;psc=1&refRID=GW0BMJQK5RV00FNNTN1F&th=1
カナルじゃないけど安い
https://www.amazon.co.jp/gp/aw/d/B001RPHUDW/ref=s9_psimh_gw_d0_g23_i1?pf_rd_p=0d2ae648-1959-496d-bd77-f10b4088211f&;pf_rd_s=blackjack-personal-1&pf_rd_t=Gateway&pf_rd_i=mobile&pf_rd_m=AN1VRQENFRJN5&pf_rd_r=H50EFQ4Z04ZGPRTHGSZD