NFI. Currently LOTS of old mando tuners on eBay.

If you NEED 'em (looks like only one-side, single strips are available), $17 doesn't sound bad.
http://shop.ebay.com/retyred4sure/m....1&_from=&_ipg=

Here's a view showing lots more:
http://cgi.ebay.com/ws/eBayISAPI.dll...m=320404081866
especially:
http://cgi.ebay.com/Vintage-20s-USA-...3D12%26ps%3D33