Will it not run on a protected GA? Not searched to find out, but 8a or 10a should be more than enough for the L16.
This day and age, really no need for PCB's on new flashlights. IMO anyway, i know subjective , but i have not used protected cells for years. Only reason i use the odd ones are for contact(longer length). Most lights even without LVP will not power up under 3v anyway, its pretty obvious when a cells voltage is getting low if they do! . I am a strong believer in treating all cells with equal respect, be them high drain, protected or any chemistry. Its not rocket science, just basic common sense(i know common sense is not that common ), just a general comment not aimed at anyone.
I am sure you have the knowledge and understanding rec, well i will go one further, i know you have. Why are you against unprotected cells? Not saying which is better, just some applications IMO dont require them. Also, with the GA protected, it does give more options for those wanting higher output lights, yet keeping the piece of mind they have added protection in the PCB. I also believe if you need protected cells as back up, then its not the right chemistry for that application.
I dont think your going to find a light that suits, not many choices to start with ...........good luck anyway on the search, maybe a modded light might be an option.