The LaserJet 4+ is a nice printer. We got one from a friend who had got it from JH Kelly, a local industrial contractor. While the cartridge was still usable (same thing occurred as yours,) we enjoyed using it a lot. It came with a network card with built in AppleTalk support. So I had fun being able to use my macs with it. For now we have it set aside until we have the extra money to buy a new toner cartridge.

I don't know how well taping the cartridge will work. But eh, you're going to replace it eventually anyway.