Here they are:
AmazonPersonally I'd get a 12 ton, this is a piece of gear where over capacity is no problem. And you may want to jack up other things. The Torin I can vouch for we have two. Make sure the jack gives enough lift, that gray chinese jack for example does not list the lift of the jack. The Torin 12 ton does 7.5 to 11 inches.
These jacks are available in Lowes and Walmart.
I learned the hard way about bottle jacks when we got a flat on Hwy 2 in MT. At least 10 years ago. The jack I used was a floor jack which jacked the small trailer up OK. But when my son started to remove the tire it dropped the trailer. So use a bottle jack and also
jack stands once you have it jacked up. We had a trip to the next town's emergency room where they X-Rayed my sons hand. That's after a local stopped and jacked the trailer up with his bottle jack. I made sure to get a bottle jack at the next opportunity.