Hi bramber,
95% + of the modern kite pumps come out of the GRI factory. This means that regardless of the brand/logo on the pump itself, it's the same product offering the same performance. There can be a few small differences (such as nozzles). What brand of kite do you use and what nozzles do you need ?
You're probably looking for an XL type pump which would look like this:

Price is $99 delivered to your door:
www.kitebud.com.au/product/airush-high-velocity-pump-xl/Christian - KiteBud