Months ago I posted a picture of a 3D printed replicas of one of the suppressors used for the M16 during the Vietnam War from a guy who made and sold them through facebook. He was of course shut down by zuckerburg within a day and the page was disappeared.
They make more than the HEL 3 of course. You can see some other stuff below.
A lot of people asked about it, the link to their new webage/store is below.