YCCC has a history of creating product designs and making them available to the contest community. Check out the following.
https://nn1c.org/so2r/ – SO2R Mini: SO2R Box In Your Palm
https://www.k1xm.org/SO2R/index.html – YCCC SO2R Box
https://www.k1xm.org/Antenna_Switch/index.html – Mother of All Antenna Switches: MOAS
https://www.kk1l.com/kk1l_2x6switch/index.html – KK1L 2×6 Antenna Switch & Band Decoder
http://www.kv1j.com/6BPF/ – YCCC 6 Band Receive BPF by K1NQ