Can't remember. Weren't cheap compared to a white COB at the time.
Figure using today's cost of XPG3's, it's ~18$ of LEDs. Then add board(copper here) and assembly cost. Could use aluminum with today's efficacy to save some.
So probably ~30$ maybe.
It's their LOB module just with 3 photo reds subb'ed into each string.
LOB - 36 LEDs connected in 3 rows of 12 LEDs
adurasolutions.com
Think there is a two channel version.
Issue will be cost vs quantity with low volume if they don't have LEDs laying around.