Give ooba a call - I had excellent experience with them, may not get you 100% bond but you are likely to win on interest rate. We got prime -0.75 last year. Also, I would work towards saving for 10% deposit in any case. It will save you lot of interest.
this - use ooba. we used them with the purchase of our new property and we had all the banks wanting to give us loans. ok it was for much R300 thousand, of which we put more than half back because we didn't use it. but we were able to negotiate interest rates etc.