I had the same feeling at first, but had to get over the fear. Everyone around my way was selling that Mexican brick that had seeds and what wasn't Mexican was sensi. The 2 places I can vouch for because I previously ordered from them was Herbie's and SVOC. SVOC is stationed in California and usually takes 4-5 days to receive your package after your Money order is received.
I do believe I heard of Blueberry Jam and had it in the early 2000's like 03. If you don't mind me asking when did you aquire those seeds? If I remember correctly it smell like a whole bunch of Hawaiian fruit's blended all together light in color with a whole bunch of bright orange hairs. Can you describe the ganja that you pulled these seeds from? You might have something really special on your hands that was lost due to hybridization.