Pool & Spa Lights service and Maintenance

I’m replacing the light bulbs on both the pool and spa lights (R40-R20 type). While doing this, I want to replace the front plates and the seals as well. Could you please guide me which is the correct model and parts that I need? I have correlated against all the information you have available regarding lights; however, I still have concerns if I’m selecting the correct ones.

For the bulbs itself, I’m considering the Pureline LED bulbs, could you please confirm these would work for both applications?

Thank you