Up until a few ago I was getting my inserts from a local place, you put them in hot water and then stand on them for a couple minutes until they cool and harden.
Then I got insurance that covered them. The difference it makes is insane. I lost that insurance 2 years ago, and I've been alternating the 3 pair trying to get them to last as long as possible. At this point there's not much left of them, but they're all I've got. It's 200 bucks for my next set (3 pair), and I'm gonna have to figure that out soon.
Dammit, now I gotta start looking for shoulder blade porn, cause that is sexy...