I've not tried it myself, but is suppose to be good for bladder problems, including urge.
As mentioned above, Jude has good reviews, perhaps email them with any questions you have, they are really good, although unsure if they ship to Australia.
There are quite a lot of pumpkin seed oil products, look at reviews. Another one, much cheaper than Jude, is NOW, but this doesn't contain soy like Jude does.