Welcome to the forum. This subject was just discussed a few days ago, under the first link below. You can order four, the one's I installed on my TM are pricey now, but they are rated for 7500 LBs. I prefer overkill, but the 5000LB jacks will do you just fine. As to being a straight remover and replace, that may not be that easy. Not knowing exactly how the pull down jacks are mounted, you may have some extra steps to go thru to swap them out. If you can post some pictures of the jack mounts that would help the forum members provide you more guidance.
https://www.trailmanorowners.com/for...ad.php?t=20906
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1