Apparently we're in the same boat. I got mine at the Company store of my last Airline...can't find a new one to go with this uniform now Arghhh!

I've tried FBO Pilot Shops (the larger ones that cater to Corporate Suits)...they usually have a nice selection of Tie Pins...the bars are becoming more difficult to find by the day. eBay is another place to look (not a fan, but hey if it works...)

Best of luck, and if you find a good place - share it with us!