Mate, keep ploddin and replace as required.
Then... as you are doing that and bearing the brunt of annoyance, get that original engine rebuilt and a relavent transmission rebuilt with reliable quality componentry and make it reliable IE: no 35 psi twin turbo 2332cc's k?
馃檪
If u start from scratch, there are no need for constant little replacements...
Then well, you gotta decide whether preventative replacement or 'replace as it breaks' is right for ya for wanting reliability. like... for eg: for how little it costs, ordering new sets of wheel bearings, bushes, shocks etc, master and slave cylinders etc. and replacing the original components on your car with new ones when they aren't faulty yet again starts that component on a 'fresh slate'. these things are cheap on ebay and in the states. the aussie dollar exchange with USA is great.
www.ebay.co.uk
&
www.ebay.com
will be ur best friends.
To simply prevent being stuck in the 'fix and replace something every fortnight' regime, i have personally decided to replace what i can that is fault prone in one go... and sure it keeps it off the road for some time, but in theory, it should be like brand new... (to the debate of purists with original german quality vs. jap/brazilian/mexican/chinese aftermarket replacements.)
Its one way to look at it, and i am not saying its right, but is a solution, if you can afford for the vehicle to be off the road. I mean, in reality there is mainly only 2 distinct options. Full rebuild (can be progressive while on the road) or fix and replace as needed.
You already spent so much cash thus far man, and the things that can go wrong are only finite.