Well, after 3 denied online/email claims, one denied return threat, and one customer service call, I finally got amazon to price match the Paul's save100 on my 55gt50! Woot!
The kicker appeared to be that the coupon is available for anyone and everyone to see and use, and it's publicly available on the website. Once the service rep found it, she apologized for my inconvenience and went ahead and submitted the refund. Thanks guys, apparently persistence is key, as well as calling in versus using the online link request.