I am trying to do a master bath remodel on the lowest possible budget. We have a jetted tub that has almost never been used and could fit nicely into the new design. But, it looks very dated because the components have yellowed. I know I can replace the fixtures, but I am not sure if I can do anything about the jets and knobs. It's a fairly standard tub so it really could look new if these were updatable. Any suggestions or cost estimates would be greatly appreciated.