thank you so much! thats exactly what we did. homedepot! but we did find a flat, round knob that did the trick and looks amazing and matches the shower head perfectly!
Once again, you and all on this site have been soooooo helpful! thanks for all the ideas and suggestions, they've all been great!

Now i have another question... lol!! the drains on on the boat are going down verrrrrry slow... especifically the kitchens and the bathrooms sink, not backed up yet, but we want to avoid that. what can we use or do to make the drains drain efficiently