Well I got a box of 8 from e$ay :

#4 Iolite ( 0.35 ct )
#7 Opal ( 0.54 ct )
#1 Emerald ( 0.16 ct )
#18 Praxiolite ( 0.84 ct )
Silver-1 Swiss Blue Topaz in silver pendant and chain ( 1.75 ct )
#2 Amethyst ( 0.75 ct )
#14 Swiss Blue Topaz ( 0.92 ct )
#15 London Blue Topaz ( 0.25 ct )

18 in the normal set plus chase sets etc.

Certainly different and fun. Cards are approximately single audio cassette sized

OK second box of 8

#18 Praxiolite ( 0.63 ct )
Silver-1 Swiss Blue Topaz in silver pendant and chain ( 1.40 ct )
#5 Tanzanite ( 0.11 ct )
#3 Aquamarine ( 0.41 ct )
#1 Emerald ( 0.15 ct )
#11 Peridot ( 0.60 ct )
#7 Opal ( 0.71 ct )
#9 Garnet ( 0.54 ct )

Somewhat disappointing number of "duplicates" between these 2 boxes and amazing there is apparently so little interest in this series here or on the auction sites

I actually want to collect this series, once I get some cashflow. It sounds so interesting, and you're right, very few places actually sell them.

and a third box of 8 ( Slightly earlier this year )

#11 Peridot (0.38ct)
#18 Prasiolite (0.74ct)
#6 Pearl (3.24ct)
#5 Tanzanite (0.19ct)
#9 Garnet (0.62ct)
#1 Emerald (0.20ct)
MR2 Garnet matched pair (1.54ct)
#15 London Blue Tpoaz (0.25ct)