Brian's Canvas Products

[Tin-Can]

Kent, glad Brian's made it right for you. I've dealt with them for 10 or 12 years and never had an issue.  My current cover came with the same tie strings that are shown in your photo.
Just a suggestion: Those are alot of work to get secured to the cover / trailer each time. I replaced all of those on my newest cover with bungie cords.
The top of each bungie, I bent closed to the D rings on the cover that keeps them from getting lost, then installed an "Eye" bolt thru the trailer frame with the eye on the inside of the trailer frame directly down from the corresponding D ring on the cover. When I use the cover, I fit the front over the bow, pull the draw strings (para cord) tight at the transom and secure them. Then hook each bungie on both sides.  That pulls the cover snug. I can tow the boat down the freeway at 75+mph with no flapping or ballooning of the cover.

I have used bungie cords on some covers, in the past, and found that the bungie cords would lose a lot of their stretch, rather quickly, and as a result would no longer keep the cover tight.  How long have you been using the current bungie cords?

  Since you have said you keep your cover on all the time, maybe bungies aren't the best for you. I keep my boat in a storage unit so it stays dry and out of the sun. I only use my cover when I'm traveling somewhere away from my local area or I will be gone over night (like from Clearfield to Utah Lake for a couple days) 
I had that cover made at Brian's in June 2016 and put a full set of bungies on it then.  I just replaced all the bungies this spring, so the first set had been in use about 6-7 years. But you have different use requirements.