You have gotten very good use and service out of your existing waders and I agree with vicrider that if you intend to replace them, I would replace them with another set from Cabela's. If all that is happening is damp feet and not a boot full of water, why not slip your feet into small plastic trash bags before putting your feet into the waders. This would keep your feet dry plus makes if very easy to remove your waders at the end of the day. I only offer this solution because you stated your fishing time is limited and this may extend the use of your existing waders at no cost to you. Just a suggestion and nothing more....
Warren
Fly fishing and fly tying are two things that I do, and when I am doing them, they are the only 2 things I think about. They clear my mind.