The collector that I got the chain from also had Dallas mailing address from the order. He gave that to me too. I sent Carol a letter and she responded back to me a bit ago via email. She still has the chain but hasn't been able to get into the website to update the contact information.
I put her in contact with Frank /
@Weedensteam and I believe they will have a conversation about what is left of the chain Dallas had re-designed / custom made. Hopefully he can work a deal to buy the stock or at the very least be able to list on his website how to contact Carol for a Weeden roller chain!