pops out of 3rd gear under load

HI, I borrowed my daughter's car, 2009 Aygo 1.0 petrol, manual. Roughly 109,000 miles on it.

Going down the motorway I noticed it was hard to get into 3rd, when slowing down in some slower traffic.

Next day going up a hill in 3rd at 60mph, it popped out of 3rd gear, and would always pop out when under load.

I guess the gearbox is knackered.

Are they all made of cheese? I'm used to German vehicles, got a VW T4 with 300,000 miles on it, still on the original gearbox (and, I suspect, the original clutch!).

Is it "pick any Aygo gearbox off eBay, and play the Aygo gearbox lottery?"

Try and find the newest and lowest mileage one I can?

I'll replace the clutch too while the gearbox is out.

Or scrap the car and get something German? We paid £900 for it, and the repair will cost a few hundred £££......