I like 'em! Shop around - the street rod vendors sell these things for about 1/2 the money of the Mustang Parts houses. I paid under $75 for my pair from a vendor at last year's Goodguys show! ::
http://a2.cpimg.com/image/62/E2/22045282-b2f3-0200014F-.jpg
Also, for a CHEAP upgrade - use 64-1/2 front turn signal lenses - they're clear instead of yellow - run about $1 more than the yellow ones - really "cleans up" the front end, IMO.