checked out the parts I need for the power board to hopefully solve the problem
TR5 - Transistor 2N6059
C2 - Capacitor 100uf25v
C3 - Capacitor 47uf63v
C7 - Capacitor 330uf25v

challenge now is finding them, Jaycar only have the first 2 capacitors and that's it.

Can anyone recommend where is a good place to get them, found them at Farnell but have to buy them in lots of 5 & 10k - slight overkill.

You should be able to use a 470uF 25v cap (which Jaycar have) for C7 in a pinch, i've looked at the circuit and since its on the 5 volt line its value isnt all that critical so it should be ok.
Its usually ok to go slightly higher in value but never lower.

Hope this helps!! Cheers... Mitch