The finder bracket is not too hard - MANY makers - GSO, Skywatcher etc. All use the Vixen dovetail system.
If you want, I can sell you a 2nd hand 6x finder with bracket for $20 posted. Basically free, considering post price these days! Almost same as this one:
http://www.bintel.com.au/Accessories...oductview.aspx
Or, you can buy the bracket ex-USA for MORE, and then you need a 7x finder too:
http://agenaastro.com/antares-quick-...m-finders.html
I am sure bintel.com.au will sell you a GSO or SW bracket.
As to dewshield cover - use a plastic elastic shower cap or food cover!!! Cost peanuts. Or make one from cardboard (I have the correct covers for my Takahashi's, but use homemade cardboard covers most of the time - don't care if I lose them, don't chip if they fall off (nor break a toe). Or for something fancy, head to Bunnings plumbing section and buy a PVC end cap - they make em big! If TOO big, pad the inner diameter with self adhesive felt - several layers on layers if need be.