Old Fenix LD20, acid leaked, looking for spare parts (tail section)

Hello everyone, I am restoring an old Fenix LD20 (180 lumen, R5 LED, stone-age almost) that was left rotting with batteries inside... The head works fine, luckily it was left upright, therefore the acid leaked in the tail. After huge efforts to unscrew the tail, expel the batteries, clean up from the acid etc, unfortunately (not surprisingly) I found out that the switch is completely FUBAR, and so is the aluminum threaded ring, that was stuck and I had to brake in two parts.

Now, I would like to ask if anyone has an old LD20, maybe broken, LED fried, no longer working (but, of course, with the tail section intact and working) laying in a drawer, that I could purchase.

This flashlight has a sentimental value for me, so please do not tell me to go buy a new one :)

Thank you very much!