I did last year, but I play the saxophone this year. Though, I wanted to play the clarinet as a secondary instrument for parade. I believe it'll be a struggle with embouchure again after a few months not playing clarinet, but I'm gonna talk it over with my teacher... I don't expect it being my main instrument
Sell it and buy a cheaper clarinet and lessons
Or actually, I'll take it back, since it's a family heirloom you should try and find someone who will order and replace the missing parts for cheap.