Hi Matt,
That list looks awfully familiar.....lol....
You will find that Andrews wont have Bob's Knobs, you will need to source these from the Bob's Knobs website I think, I did.
They also wont have the energizer head torch, you can grab one from Coles.
Also, based on their pricing, they probably won't be giving you any "additional discounts" by buying all from them in one go....you will find (from research) that their prices are the lowest, and if not, they will definitely match or beat the competitor out of principle.
I know this from experience.
Dont forget the planetarium disc either....especially with the manual dob, you will need it to star hop.
Cheers
Chris