Quite minty set of these ultralight-weight tuners from Gotoh. Turns out they do not fit on a Mustang headstock
I bought them through TB from member thisSNsucks just last week. He was selling them to get the reverse wind versions of these. I believe they were only ever installed on one bass before.
$100 shipped USCON, Paypal
Here's a pic from thisSNsucks when they were installed:
More info from the manufacturer: http://www.g-gotoh.com/international/?btp_product=gb640