+1 on the Kanger Subbox Mini kit. Contains all you need except an 18650 battery (and I suggest a Samsung 25R5 or LG HE2).
Aspire has many good kits a well, and you can always mix and match your battery (MOD) and tank combo to suit your own needs or preferences. I would suggest the Subtank mini or AeroTank V2 from Kanger, and from Aspire, the TritonV2 (not the same as what you have), Triton Mini, or Nautilus for tanks. As for battery (MOD), I would suggest a reliable box-mod like the Kanger 50W (that comes with the subbox kit), Wismec 40W or Eleaf iStick 50W. The latter two have built-in batteries and won't require separate purchases of 18650 cells.