Just to close the loop ...
I was able to locate a brand new set of PRS Phase I Locking Winged Tuners!
I looked everywhere for these tuners:
Email and pictures to PRS - No reply (but see following).
Letter to PRS - Reply, but informed that the tuners are no longer available, suggested the Scaller M6 non-locking as a direct replacement or searching the used market such as eBay.
Email and pictures to Schaller - Reply, but informed that the original PRS part is no longer being produced.
Contacted various PRS Dealers across the U.S. (also sent pictures) - Not available from any one of them except for Ed Roman, who wanted $300. (ouch!)
Visited my local Sam Ash and Guitar Center (and waited while they called their contacts at PRS) - No luck, but the PRS contact at the other end of the phone suggested Phase IIs (and a few new drilled holes). :shock:
Posted Want It Now on eBay and WTB on a couple forums - No bites.
Finally, someone on another forum got me in contact with a dealer in Wisconsin (USA) who came through for me. This dealer,
http://www.davesguitar.com/index.html, is now at the top of my list for anything related to PRS (or other guitars for that matter).
He also has an amazing personal guitar collection that can be viewed on his web site (and I believe also played in person). 8)
Can't wait to get these bad boys on my guitar!