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.