You might try contacting this site. It looks as though they have this in their stock. I'd be curious to know the outcome. They have e-mail.

http://www.ars-grin.gov/cor/catalogs/fraseed.html
they have the seed listed here.

Here is a link that might be useful: NCGR

A Fragaria vesca cultivar. Also known as 'Baron von Solemacher'. Much more easily located 'Alexandria' ('Baron Solemacher Improved') is similar, might be an acceptable - or better - substitute unless you are assembling a collection.

Bountiful Gardens, Willits, CA was still offering 'Baron Solemacher' ca. 1998. Don't know current supply.