Where does everyone get their parts online? i.e. absorbers, cam belt kits etc.

Try Steve at Alternative Autos - he has an ebay outlet

Indeed but postage is extortionate for small items as are some of the prices these days. Shop4Parts with the 10% code is good with more reasonable and at times free postage.

Shop4parts is Eurocarparts cheaper on line presence, Quality is not always the best, indeed Eurocarparts trade counters often offer a choice between Aftermarket and OEM quality parts.

Aftermarket being aimed at traders wanting to maximise profits. eurocarparts.co.uk on line have near-constant discount codes on their website if you register with your email address.

I think it's CarParts4Less that is essentially the same as EuroCarParts but cheaper, Shop4Parts tends to be more Fiat/Alfa focused?

There's also AutoDoc (or BuyCarParts or a myriad other similar online presences) which can sometimes be good once you can see past the constantly varying "original" prices and "today only" discount

I always use Steve at AA for parts that he sells, might not be the cheapest but he has good items where places like ECP sell on price - I use them for some things but would far rather support Steve who is a real Coupe enthusiast and invests in stock which helps keep our cars on the road.

As above Steve is a good source for parts and knows his stuff.

I would not be in a hurry to recommend some Birth parts though - especially (rear) wheel bearings which have been failing regularly - I went through 4 in quick succession and ended up with SKF

Try also https://m.buycarparts.co.uk/