From John Douglas:

  DK-50:

    Water @ 125 F 750 cc
    Elon (Metol) 2.5g
    Sodium Sulfite 30.0g
    Hydroquinone 2.5 g
    Sodium Metaborate 10.0 g
    Pot.Bromide 0.5 g
    Water to make 1.0 L

The darkroom at the U of W. Australia should be able to brew some
up for you.

Or, go to the local hospital/clinic/sawbones and beg/borrow/steal
a pint or two of X-ray developer: X-ray developer == X-ray developer
== X-ray developer.

However, DK-50 !=/<> X-ray developer.  It is a close relative of HC-110
in activity and effect.

The formula provided by Nicholas Lindan is correct, the components may
still be available from Van Bar at either their Carlton ot South Yarra
addresses if you come from Melbourne.

The base ingredients should still be readily available and you can of
course substitute Sodium Carbonate for the Sodium Metaborate but you
will only need about 1/3 of Sodium Carbonate (anhydrous) compared to
Sodium Metaborate.

When mixing Metol formulas you should observe the following because
Metol will not dissolve properly if you add it to solutions with a
large amount of Sodium Sulphite;

a)    Add a very small amount of the Sodium Sulphite to water first,
the water temperature should be 30degrees Celsius.

b)    Add the Metol quickly stirring until dissolved then add the
Hydroquinone and the remainder of the Sodium Sulphite.

c)    Add the Alkali (Sodium Metaborate) last.

I didn't realise that DK50 was sutiable for XRAY film.

Divided  and dilute DK50 is an excellent developer for modern B+W
films such as Kodak TMAX-100.