Alternate Magic item creation rules

[rel]

I'm looking for magic item creation rules that are mechanically similar to the Incantation variant magic rules on the 3.5 SRD.
By which I mean:

- Individual rituals rather than a generic system
- time consuming and elaborate rituals days of chanting, multiple helpers, elaborate props
- special requirements like having to be on a high mountain, wait for the full moon or have a special component
- no mechanical character requirements (so no special feat or PRC required to make your magic sword)

Anyone know of anything official or homebrewed that fits the bill?

[Crake]

Check out pathfinder unchained's dynamic magic item creation (http://www.d20pfsrd.com/magic-items/#TOC-Dynamic-Magic-Item-Creation). It's not exactly the same as what you're asking for, but it's a good starting point.