Thanks guys....the lock is a "Lott" (or at least that is what it has on the side).  It appears to be rather well made, but I dont know that much about them.
  The frizzen does have some scratches in it....I will do the crocus cloth thing prior to the next range session; also, I will try wiping the flint/frizzen after every few shots and see if that helps.  After cleaning, I do seem to get a much better shower of sparks.  If that doesn't work, I guess I will see about Gil's suggestion on getting the frizzen replaced.
  I do plan on seeing about getting the front sight replaced with a smaller on.....It shoots quite low at 25 yards and I am hoping I can get a small 'turtle' bead put on to make it a little more authentic and make it shoot to point of aim a little better.  This last range session had me a bit frustrated; out of 10 clays, I only hit one, and I missed a couple because the gun failed to spark.  My intent is to eventually take the gun waterfowling.....that is, if I can ever get to hitting anything with it regularly!