I had a look last night and decided Il replace the whole wishbone with new bushes as it will probably be easier. Looks like an easy enough job so Il give it a crack myself I think.
Don't think Il bother with the Cupra bushes, the standard ride is pretty shocking on the roads round here anyway, and probably why the bushes are falling to bits!
I would 1000000000000% advise you to change your mind.
You could replace the wishbone, but if you do so, bear in mind you'll NEED the tracking to be done afterwards, and you'll be putting a standard voided bush (as supplied with the wishbone) back on the car. This voided bush will last absolutely no longer than 20k miles.
Whilst I'd agree the roads and shocking, it's not all the road's fault these bushes fail, the
problem is with the design of the standard ones, they are voided! A Cupra one is a solid, non-voided rubber bush and so it won't fail again. Every
Ibiza should have been fitted with the Cupra bush from factory.
I've got Cupra ones on mine and the ride is not that much worse, it is in fact better, as the wheels no longer move in the arch when you brake!
£150 is not a bad price either. I've seen quotes for the same job of £300 before. I'd let the garage get on with it, just supply the Cupra bush yourself and insist they fit them. If you can get the tracking included in the price then you've got yourself a deal.