So I need some bits pre MOT

[JayB5UK]

Managed to scrounge a ramp at a friends workplace last night, did an oil and filter change last night and had a poke around to find the knocking coming from the car and to suss it out a couple of months pre MOT.

I need a O/S upper rear front suspension arm (already got), a lower rear N/S one and new Discs & Pads (ordering Mintex red box item Karl suggested)

Any ideas on cheap-but-not poo lower rear arms...? Millions on ebay! Dunno if I should do both, just do the knackered one, just do the bush on it, get a decent one on the knackered side, or get a matching pair of cheap ones.