I have clear lenses for my front turn signals, but I'm running Amber bulbs. I've never been messed with for that. As long as you use red bulbs, or some nice bright red LED's, you might be left alone, but if you run the clear lenses with clear bulbs I can almost guarantee you'll be pulled eventuelly.
Here's a set on ebay;
http://cgi.ebay.com/ebaymotors/67-72...Q5fAccessories
Advance or Autozone (maybe both) sells Moog stuff, but be sure to check the box, people have been known to take out the moog stuff and return cheap knock off stuff to get some $ back.