I'm about to get some arrays
They look like this one but with IRdiodes...



Of course they can be clustered together...
Dualsided PCB, 12pc 5mm diodes. measures only 42x12x1,6mm.
4 circuits of 3 diodes in series - can also be sold separately.
Will be tricked out with 12 VISHAY TSAL 6400 IR diodes and surface-mounted resistors
They will require 6Volt powersource and if needed I can supply that one as well...
I have no clue yet of the total cost but as usual I'll charge as less as possible to maintain the service to forum members
//UndCon