Need help repairing a hp9120 printer

[Roland57]

I‘m a lucky owner of a hp9100B with 9120 printer. The 9100B is in very good cosmetical and functional state - but the printer needs some repair: I exchanged the paper transport wheel sucessfully. Unfortunately the „printhead“ has been damaged. As far as I see this printhead consists of 7 wires closely spaced to each other. The ends of these wires burn black spots on the metallized paper. Everything worked fine after the repair, but I forgot to tighten the screw that fixes the printhead - the head crashed and is now damaged. What could I use as a substitute ?

Roland