looking good man
I agree with lecap, if you can't afford the big daddy fuel tank then look at clarke or IMS. a bigger tank, while more expensive, is always a better alternative to slapping on a jerry can somewhere... in my opinion
For that screen, I reckon try and find a 2nd hand KTM 950 / 990 screen and chop it to fit

beware though, mounting onto the plastic is not always the strongest, you may want to look at some sort of re-inforcment
For the small tank bag, and a tail pack, check out the Kriega US-5 and US-10 tailpacks - you could easily find a way to fit these to the front. Sure, they're not super-cheap (R400 and R560 respectively) but they are also not expensive, and are tough as nails, easy to fit, and 100% water and dust proof.
5l -
http://www.kriega.com/pages_sa/us5/US5-topframeset.html10l -
http://www.kriega.com/pages_sa/us10/us10-frameset.htmlPM leftless he sells them
Of course then, you could look at a few ergonomic and "toughness" improvements... I would recommend wider pegs, stronger handlebars, risers (if you are tall), and decent hand guards...
Do all of that, and your DR will be comfortable, good looking, AND unstoppable
