Parahub and null parallel cable
 

Parahub - supposed to be able to connect two parallel printers to one computer - comes with a null cable (to go from pc to hub - cost me £15 at pc world just for the cable!) it powers itself and switches automatically but you can use a 9v dc adaptor (power supply doesnt come with them) to power it more if necessary.

I bought it but my HP laser printer doesnt like it so i dont use it

Yours for a tenner

(and yes i am having a much needed clear out)