I would definitely recomend sending them in both me and my brother had small leaks in our 8X's and they were fairly promptly replaced with the new I think Snakerivers, Here is the info you need:
Cloudveil Wader Warranty and Repair Policy
We build Cloudveil waders to last. If a Cloudveil wader fails due to workmanship or material defect during the life of the product, please return it to us for repair or replacement. All defective or damaged waders must be returned for evaluation and will be repaired, replaced or returned at the sole discretion of Cloudveil. PLEASE NOTE: We do not warranty damages caused by improper care, accidents/abuse or natural deterioration over extended use and time.
To submit any wader to our warranty repair center, a return authorization number (RA) must be issued. Please call Cloudveil Customer Service at 888-763-5969 to be issued an RA. Typical turnaround time for repairs (with shipping) is two to three weeks, but may be longer during periods of high volume. PLEASE NOTE: All waders must be cleaned before being returned to Cloudveil, unclean waders returned for repair and/or warranty will be returned to sender.
If it is determined that a repair is not warranty related, we will offer to repair your waders for the cost of the repair, plus shipping. In these instances, we will contact you with a repair estimate for your approval before initiating the repair
Haven't tried the Simms but I must say I really like my Cloudveil's.
Sorry I missed the part about there number not working from Canada, that is where I called from probably about 6 months ago, if your home phone doesn;t work you could try setting up a skype account and calling them that way.
Cheers,
Brian