Help!! Lyman peep sight!!!!!!!!

[John K]

http://www.jesseshunting.com/forums/style_emoticons/<#EMO_DIR#>/smiley-bag-on-head.gif I went shooting this morning and somehow I lost the little screw in aperature that goes woth the Lyman peep sight on my 39A.
Can I buy just this part?
Lyman has a web presence?
Local gunsmith?
ANy help would be apprieciated.
John