My /2 conversion was built in Austin TX back in the early 1980's at an independent shop.  The photo is from the 1984 BMW MOA rally in MT that was shared with me by someone who recognized the bike and had his original pictures.

Three owners ago, the bike was in Nashville, and that owner loaned the tank to someone and it was subsequently lost.  IIRC, I remember seeing it for sale on Craigslist years ago and traded emails with the seller if that memory is correct.  This was years before I had the bike.

The tank is a large fiberglass, and has the script "The Plumber's Bike" hand pin striped on it.

Any leads would be appreciated!

Here's the bike in 1984

<a href="https://gagewagoner.smugmug.com/R90S2-Conversion/i-VJ5x3Tg/A"><img src="https://photos.smugmug.com/R90S2-Conversion/i-VJ5x3Tg/1/12f117f9/M/3C818763-8458-414A-9F71-AC527322050A-M.jpg" alt=""></a>

Here it is now