Hi, I have a pair of Speakman Kent shower handle. One for hot and one for cold. I would like to replace them with new handles. I can remove the handles and stems. How can I replace them with new handles, not necessarily Speakman, preferably with brands that be bought from Home Depot or Lowes, without posing any issue with the faucet seat? I would also like to replace the stems because they don't turn smoothly anymore. Is there any replacement kit, stems and handles, that I can buy from HD or Lowes? Again, my concern is it sould fit against the faucet seat. The current stem has the washer attached to its end. Please help. Thanks.