caravela 18650 upgrade?

[hubstacker]

so I just got my caravela clone today and for $18 it was a high quality clone. the only problem was that it only came with an 18350 tube. is their any where i can get an 18650 tube upgrade of some sort? (besides fasttech that is)

 

[koski88]

hcigar clones of this mod come with all 3 tubes and they usually run around $50-$60