What’s wrong with your rear trailing arm? Is it to far gone to be welded? If you look on real oem and select your model you can get your part number list and Google for parts and shop about from eBay,
https://www.schmiedmann.com/ https://www.lllparts.co.uk/ eurocar parts, Autodoc, a dealer you can be suprised at some prices and sit down for others but best of all ask
@spurs fan in a coupe if he can help you out. Once you’ve done you’ll have a price range hopefully to fit your pocket it’s how I’ve gone about it. Regarding control arms ( if that’s what you mean by legs) for new ones eurocarparts looked good for Lemforder oem supplier. As for springs dealer prices will be pricey but look up your part numbers and have a gander on eBay if Andy does not have any. H&R springs are good but have a little drop, if you find your shocks are shot Sachs are oem and cheaper on eBay best to shop about though other members have used monroe shocks as well.