How to get clear flexible resin ?

Hello everyone,

We need the old clear and flexible resin, to craft parts that must be translucent…
I would be very surprised that Formlabs doesn’t keep offering it, because it’s just very useful.

Anyone use this resin ?
How do you obtain it ?
Does Formlabs keep producing this material ?
Can I use a material from another brand ? Wich one ?
Thanks.