New member here hoping for help!

[Jraw1811]

Hi guys new here and desperately seeking some help! Had the timing chain and all associated parts changed recently which was a sting cost wise! But just encountered any issue which may condem my poor old s4 😔 power steering failed a couple of weeks ago which was a bit of a surprise owing to the fact I’d had a new genuine rack and pump fitted less than 12 months ago(1560 miles!) taken it into my local specialist and he’s just informed me that the aux plate that drives the pump is knackered and the engine has to come out and be stripped to repair! He’s quoted around £4500 to do the job but owing to the fact I’ve spent more than that already this year on it I’m very reluctant, I’ve been toying with the idea of fitting a stand-alone electro hydraulic pump to remedy this issue? Any one here know anyone who’s done this? Any input would be greatly appreciated