I somehow remembered all about it years later and did a search around for the seller. I'm unsure whether it was the same company but I found Irn Bru flavour on the website.
The company also had bubble gum flavour. I had to try that, too!
The items arrived a week or so later...
They looked bad. Smelled even worse.
I could only muster up the courage to cut a small slice of each. Both tasted disgusting. I haven't eaten any more.
What was also hideous about this experience was the fact that, even though I threw them out, I could still smell them in the air days later.
It was not a good purchase at all.