Someone on eBay has been advertising Frejus/Legnano NOS seat bolts for $30
here:
http://ebay.com/<blah>
0QQitemZ230389718349QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item35a44c1d4
d
Item #: 230389718349
Looks right to me, and there is a good clear picture. But I haven't seen one
since I sold my Frejus track bike many years ago...