Similar to a kayfun but better.
Similar to a kayfun, meaning bottom coil type of tank? Or closer to the AGA you posted, which has a top coil deck called a genesis style tank?
For tanks like the Kayfun, that aren't the Kayfun, you can give the eXpromizer a try. I think it has a slightly larger deck for building, which may make things easier, but you'll still need to wrap the coil legs around the posts. Decent price for an authentic tank in this category at $69 from Vapinart.com, but the workmanship can be a bit iffy on the threading, especially around the chimney area. Unlike a kayfun, you do not need a screwdriver to adjust the airflow, nor do you need a syringe tip for filling. Once it's built, it's similar to large bottom coil clearos in that you can access the coil in the base while keeping your juice in the tank.
The Fogger V4 is also a bottom coil, rebuildable tank. You can get a genuine one for $30, making it the most affordable option. I don't have personal experience with this one, but I think the latest version has a larger deck for building.
The Aqua is another one, only this one uses thumbscrews, rather then screws for the posts. Don't know if that would be easier for you.
Genesis tanks, like the AGA ones are types where the coil is built on a deck on top of the tank, rather then the bottom. Some people find these to be more challenging, as they are typically used with stainless steel mesh or cable as wicking. There are extra steps in oxidizing the stainless steel, and preventing shorts, but the benefit is that you supposedly will not need to rewick or recoil for a month. I had a Kraken clone from Hcigar which is in this category, but I only set it up with cotton wicking. Haven't attempted stainless steel, like it was meant to. As a result, it leaked while on its side and I had to tilt it to make sure that juice reached the coil while vaping.