That one may or may not leak.

I can get a genuine Volvo one if you're interested

It should work fine. Genuine is better though.

Berry Motor Group Volvo Repairs will have on the shelf and all other spares you need, genuine Volvo has 2 year Australian warranty as well.

Call (03) 9874 5544 and ask for Mark, and mention Les said to buy me a pint for this.

Mark get parts from a dealer they know ( and i have met the parts department guys from that dealer at an industry function in Melbourne , Mark is certainly a good customer and they give hime best deals in the country good guys as well! )

Cheapest Volvo genuine parts in Australia, you won't get cheaper.

All good, I'll try and go for the Genuine Volvo Parts. When I put it into Google, I get the Five Dock website, is that right? I'd like to try and get a couple of other genuine parts along with the cap, so I'd like to figure out how to do it.

The dealership can often get parts quickly (same day even), but they are the most expensive. I believe Volvo Five Dock will tell you to contact Volvo Parramatta for parts desk.

Generally if you want OEM parts the cheapest way to get them is through overseas sites like fcpeuro.com (who discount shipping for Oz Volvo members also) or ipdusa.com, or other similar sites.