http://www.thomann.de/it/thomann_effect_pedal_bag.htm

Fits flawlessly

I would love to get a branded bag for the HD400...

I have read that finding a bag for the HD500 is problematic for a good fit.

I found that SKB has a few soft cases made of ridgid EP foam. They are very light and sturdy, and come with a carrying strap.

The optimal one, for size is the SKB 1SKB-SC2111, but when I was shopping was hopelessly backordered. They might be in stock now.

*Edit*: Found it in stock HERE: http://www.americanmusical.com/Item--i-SKB-SC2111-LIST   

Look like this:

I bought the SC2311 and after adding a little egg crate padding works great!

The zippered pocket is large enough to hold (2) 21' Monster rock cables, a 10' stereo headphone cable, an Altoids tin for ear buds and small 1/8" adapters, and my iPad in a survivor case!!!

Just ordered the GK-2210, should be here by friday.