Cylinder is thin plastic and the pump is also plastic. A friend had a similar pump, which didn’t last long. Try the Toolshed site. They have 2 outlets in Sydney plus a website:
The Toolshed - Great service guaranteed! – The Toolshed AU
San Francisco pump is very reliable; I have had one for 10 years, the brass type not the plastic trigger action. LA pump looks just as strong. I am fairly sure the parts are interchangeable in those two brands. SF Pump seems to be an Australian rebranding, I haven’t seen it in US websites, but I am fairly sure it is imported and the cylinders seem to be identical to the LA type.
Unfortunately the brass pumps at Toolshed don’t have gauges. Others may be able to inform us of the reliability of the plastic trigger pumps with gauge. Kaplan pumps are available at some Aus outlets and look identical to the picture captioned "SF style plastic one handed penis pump" on the Toolshed site, but with a gauge. They are not significantly cheaper than metal, from past observations.
The one-hand pump with gauge at Eagle Leather (Melbourne) is metal and looks like good quality:
The basic metal SF pump is also cheaper by $40 there.
I have no interest in any of the vendors mentioned.
AUD $1 is now worth about USD $0.87. At .80 we pay $1.25 for a USD $1, and at 0.87 we pay $1.15 for USD $1, in case you are tempted to buy from US websites. You have to allow a significant slug for UPS or fast postage if you don’t want to wait 1-3 months for mail to arrive.