My contact at Gudebrod alluded that they will continue making the thread for Orvis but if you know your Gudebrod, you realize that Orvis doesn’t sell the full range of colors from the Borger System that Gudebrod does. If I get clarification on the Orvis deal I’ll post it if anyone is interested.
As a precaution, yesterday I ordered a lifetime supply of thread in the colors I use, just in case!
Sorry I missed your question. I ordered my Gudebrod from [url=http://www.versitex.com/versitex/product.html?Id=FTTGBCCOL:b6044]Versitex[/url:b6044]. They are who Gudebrod will tell you to order from if you contact them since they are right down the road from Gudebrod and carry all the colors.
After that it can be tough to find although Cabela’s does sell some colors.