For some of us, $34 is chump change. For others, it’s not.
I personally would rather buy another kit for that price. A 3.0 motor is just for running around, which I find is boring. It’s too fast to do anything fun, unless your idea of fun is watching your car flip while you take turns.
I’d rather spend $34 on another car, grab a buddy and build a makeshift track. I’m sure you’ll get more enjoyment out of that.
You could get an OEM3.8 from http://www.QuestFormadness.com for $11 US, but the shipping to AUS might be steep.If the 3.8 is all your ordering, email qfm@comcast.net directly and geta s/h quote, and you may be able to avoid the intl shipping surcharge, which would drop shipping to $4 US. Hope this helps.