I just found glasstronics purple a few months ago and love it. And will be so sad if they really are not making it anymore. I never ordered it because i didn't know it turned darker in the flame when i saw it i thought it would be like spring purple boro bar but no.
i did a little looking and it dose look like all the big glass suppliers are out i did find this web smaller web site that has it listed for sale.
I have never used this site before but its the only place i see it for sale now
http://artistryinglass.on.ca/GLASSTRONICS-GLASS/
good luck
edit - here a day latter and the glasstronics glass is no longer on the site sorry for the false alarm.