Hi, I have two amazing Sigma guitars, one is a first generation DR 12-7 with the original case and hang tag w/price & a first generation GCR 7. I need a truss rod cover with screws for the GCR, if anyone can help me please email me:   johnnym72@netscape.net    Also, if anyone knows a good Luthier in ohenr. - Ontario - Canada, near Windsor, Ontario - Canada, please let me know at the email address provided above. Thank you in advance, Johnny.