WTB WTB - Carbon Prefit - 223 - Origin/TL3/Solus

looking for a carbon lightweight prefit in 223 for an origin/TL3/Solus action. Looking for 16, 18, or 20”. The shorter the better. Trying to build a very lightweight build for my kids since the 22LR isn’t cutting it anymore so the shorter the better. Looking for the shouldered version and not the barrel nut savage style.