Hi,
a while back I was inquiring for sources of Multilasers for kitbashes, proxies and potential heavy weapons teams as well as Shotlas for Infantry. Meanwhile I have fiddled around a bit with 3D modelling on thingiverse and came up with two files which I got printed with an SLA printer via an online service. For those interested here are the files and results:
Shotlas:
https://www.thingiverse.com/thing:4804581
Note that the 3 barrels are really seperated from each other. I have to admit that in the final printing result, the barrels look slimer than I would have thought (maybe half the diameter of a normal lasgun). Maybe they look better if they got enlarged a bit. But for my purposes they'll fit nicely. I plan on getting a unit of Victorias Beastmen in the future and kit them out with these, maybe as shotgun-Vets.
Twin Multilasers:
https://www.thingiverse.com/thing:4803433
These are meant for a Carnodon proxy I plan, but I also consider building a heavy weapons squad with these as they look pretty dang awesome in my opinion. Would be cool if it was a real option, as heavy 6, 6/0/1 doesn't sound to far from the heavy Bolters Heavy 3 5/-1/2, but it would have utility against hordes of poorly armored W1 guys. A man can dream...