Quickanddirty
100+ Head-Fier
If you're a function over form kind of person, you can also create a really comfortable leather suspension strap for just the cost of some scrap leather and a couple minutes. If you split off the leather at the ends like I did, you need about 8 5/8" between the cuts for a comfortable fit at max headband extension.
I just tried a similar construction for my heddphone but it didn't work for me as that extra layer took too much room and I needed to pull the cups over my ears with pure brutality which wasn't comfortable at all.