Polysterene 6-pack mug mailer boxes

I usually use the polysterene 6-pack mug mailer boxes for shipping bigger orders (and ones abroad) but was told that the company that sold them have closed due to a fire. Does anyone know where I can get these or an alternative from?

Thanks

You don't say who the company is that has closed, but is this of any help to you?...

https://cera-packaging.com/product-c...mailer-boxes-b

Can't you send 6 smash proof boxes? Better than nasty polystyrene which just crumbles on impact.

Thank you - I'll have a look at them. I usually order from bms and I think it's their supplier who closed.

I need to send around 30 to the Netherlands. I use the smash proof boxes for UK orders but have experienced too many broken ones when sending them outside the UK.

I double box with 6 inch double walled boxes. Only had one single breakage when both boxes had been soaked and lost their strength. They're about 28p each.