Measure the height and buy any random jack. ETrailer has good pricing on them back when I was destroying one about every 6 months. Camping World store had a sale once, too.
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Officially a SOB with a 2022 Jayco Precept 36C
Checkout my site for RVing tips, tricks, and info | Was a Fulltime Family for 5 years, now we're part-timing on long trips