I have received very good quality, suede-lined heavy leather 4 straps from Italia Straps over the years.
http://italiastraps.com/index.html The combination of soft, thick leather in a 4 wide strap has allowed me to wear some extremely heavy basses for whole shows with no back or shoulder discomfort (always a problem for me before I started using 4 straps exclusively).
For quite a long while Italia ran two straps for the price of one, resulting in silly low prices. As a result, I was able to color-match lots of straps to specific basses (an otherwise unaffordable luxury). Not sure how their specials are running now, but definitely great prices for very solid, heavy leatherwork and nice material. Compared with Moody and some of (what I consider) the truly artisan leather works, they are pretty vanilla in styling and construction. But with the wear and beating straps take, they are great for the use. One caution if you order: Their delivery times are maddeningly long (1-3 months), but they always deliver as ordered. Just don't place an order and start watching the clock (or calendar, for that matter).
I'm not paid or related to the Italia folks. I have one of the original Alembic straps made by Moody and love the refined work. I'm just a happy Italia customer.
Bill