Well I needed 15 meltaguns for my Necro 8th Mechanized Guardsman army, and we all know how hard (and expensive!) meltaguns are! So rather than scratch my head wondering how I was able to find (and afford) 15 meltaguns I decided to scratch build my own.
I then cut them to approx 0.7cm in length, I used an actual Meltagun model for measurement.
After that I filed both ends to ensure a flat surface for a good fit.
p.s I missed photographing a step after this, which was to drill out the end of the meltagun barrel.
-Those who want more Melta's go make your own!