Can LEPA only be alternated with a static plate for germination?
If you are prepared to remove everything except the regulator, then you can put anything you like on the sprinkler outlet. One product allows you to switch over from germination sprinkler plate to LEPA bubble head with an addition of a length of hose to lower the LEPA bubbler outlet height down to 150 mm off the ground. The sprinkler would normally operate at around 1.5 metre height. Whilst this is the simplest procedure, you could remove the whole sprinkler body and replace with a moving plate sprinkler body if you wanted. You will still need to reduce or extend the dropper length so that the sprinkler and LEPA operate at the correct height.