That is unlikely to be a power rack. If it is, grab it. I've just rebuilt one and the bits came to more than that. Changing it is a swine, Underneath and filthy.
It is doable though but you may need a T55 Torx bit to get the ram off. If the ram is weeping, then that is a doddle. just swap it out. Plenty of spares on this forum

If it is from the pinion valve, a repair kit is about £20 but read the postings on how to do it first, 'cos many have tried but fewer have suceeded. Persevere with it though. Get a few quotes so you can brag about how much lolly you saved when the neighbours see you emerging, black and grimy from below!