Although it is expensive, Quick still seems to be the best; I have tried a few cheapo bottles, but they dont flow consistently, and dry up too easily, meaning you spend half your life washing the nib in warm water.
Have a look on Ali Express; I bought mine from a seller who also runs a big Office Supplies store in my wife's home town; if I buy them in the physical store, they cost me less than £2. Obviously, they are not titled "Parker". The only other difference is that they come in a useful felt bag, rather than a throw away box.
Answered my own question. Haha homemade tattoo dots and smiley faces
Omg a fountain pen. That takes me back. Can you still buy bottles of ink?