Alright, I'll try to help, You can try this (316L 22ga - add a wrap or two if needed) or this (6 probably) for starter. Although I highly recommend coil your own with 316L wire. It's much cheaper, easy to do, you can experience with different types of heater and number of wraps, and you have lots of wire haha. But anyway it's gonna be much harder to set up the TCR without watching the resistance as it changes while heating the coils. I'd spend that $40 to get AF compatible mod.I'm not using an AF compatible mod. I don't think it's the wrong value, but yes probably the coils. Again that's why I asked for specific coil recommendations, but aside from recommendations for the mesh heaters and thick gauge wire, no one has been able to recommend prebuilt coils that I could just order.
BTW, can you give more info about your current setup?