No problem, pop down to the local office supply shop and buy one. I turned up and found that they don't stock the model that was required and have no intention of getting stocks of that model in. So it was off the the big electronic superstore only to find that they don't stock it either!
My last option in Yambol was a small computer store and was quite pleased they had a black ink cartridge in stock. So, off home to fit it in my printer only to find it wasn't compatible and deemed useless. the problem was I had opened the sealed packet and no refund possible, 33 leva out of pocket and no still without ink in the printer.