Looking for opinions.......

I have an older pair of Cabelas stocking foot waders that are no longer repelling water in the foot area.

The waders are approximately 12 years old and I have noticed that my feet are wet at the end of the day. At first I thought that it may be condensation or maybe sweat so the last time out I went with no socks and confirmed that, sure enough, the waders were letting water pass through the "booties". Is there anything I can do to remedy this situation or is it time to treat myself to new waders?

I realize after such a long time that these waders don't owe me a thing but other than the wet feet they are in good shape. If it's indeed time for new waders, is there any advantage to upgrading to "high end" waders that will likely cost 2 to 3 times as much as a replacement pair of Cabelas at today's prices? Unfortunately non fishing commitments have reduced my time in the river to a fraction of what it was so I'm concerned that I wouldn't realize the value of a pair of expensive waders.

Thanks in advance for your input.