Hello Ray, I think the best Holographic Tinsel is the ones that you can find, as for prismatic I've no idea, but I bought these at a Fishing Fair, I halved them with a good friend on this forum, I have used different coloured holo's for 30yrs.I used to buy them from Calebra's in the USA.
The second picture is Florists ribbon which I've strip cut on a Paper Trimmer to 1mm 2mm and 3mm widths this makes bodies, thorax covers etc, some of the colours are bright but not all, if you can't find the colours you want look to this material.
Robbie