Power Steering Stop Leak

[Greengecko]

Any recommendations? Seems to be a fair few on the market, are they all very much the same?

Just to note this isn't something I would normally try, but the car is our 2000 Ford Focus shed that's just passed 175k and will need quite a lot of welding work come its MOT in Dec, so ideally want to make it until then if possible before it has to go!