Lumbar Support in 06 Prius?

I was wondering if anyone has installed lumbar support in a 2006 Prius. If so, could you please post any details about it (what brand, parts, etc). I've read the earlier thread on lumbar support installation on an 05-- have the seats changed significantly with the 06 model? I ask because when I looked into having a local place do heated/massage seats and lumbar support, they said they could do the heat/massage, but not the lumbar.

Thanks for any input!