Need help choosing TIR Lenses for sofirn SD01 pro

First time poster!
I have recenty bought a Sofirn SD01 Pro (supposedly a 10k lumen model)

Video link to the lamp

It uses a cree xhp50.2 led (or three actually).

Now, i am a scuba diver and this light is an excellent price for a travelling scuba torch.

But… (All stories has one)
The beam is too wide for the cold nordic waters and i am looking into modifying it to carry a much more narrow beam.

I’m new to the modding scene and am looking to switch to TIR lenses. Purpose is to get tighter beams (like 8-10 degrees maximum).

And i am lost in the vast jungle of available lenses and which ones to buy.

I have’t disassembled the light head yet so im not sure how “tall/deep” the current reflectors are (if that info is important to select the correct tir lenses) but for a guess-timation id say 24mm (just under an inch).

I hope i can get some wisdom from you guys!

Thank you for the forum, i have read many threads in an effort to learn as much as possible.

Thanks in advance

Have a pleasant time at this friendly forum, pelto886!

Hej, tyvärr kan jag inte hjälpa dig. Har det löst sig? Har beställt en för inte så länge sedan och undrar om du skulle kunna posta några beamshots. Har letat lite men det var ganska snålt med dom
.