You only need a reco head probably about 250 and do the work yourself, you would have to get quotes.
You can keep driving it but ....... , the gasket will get worse, then either you leak into your oil and stuff the motor some what, or blow to the oustside, and spew coolant everywhere, or may end up with a blow out between cylinders and bad compression, and very rough idle indeed.
If you really want you could just pull the head off, clean down both the deck and the head with a razor blade and then get a good head gasket (monotorque have always been good for me), and some head gasket goo as well, torque it down according to the instuctions, and hopefully problem solved.
Also needed inlet and exhaust gaskets as well, most of the time they come in the kit.
I did put something here, but it vanshied, I think
"So long and thanks for all the fish!"