Thank you for your question, TJ. For the lav faucets, you can order the lever handle of your choice along with a Delta part #RP20111 (conversion ball). One conversion ball per handle.
For the Roman Tub, order the larger lever handle of your choice. No conversion ball needed. Before the lever handle is installed, you will need to rotate the cartridge 180 degrees (cold side only). This will allow both handles to turn inward when the waterflow is on.
For tub/shower comboniations, it is important to know which series is currently installed. To open a dialogue on the options, please contact our toll-free Home Owner/Warranty department at 800-345-3358.