After a few little bits for an L322, couple of interior bits and stuff, other than Egay where else is good to try? are there any RR breakers that do mail order, or any in Herts/Essex?
Depends what you want when you say 'interior parts'?
If you are talking about upgrade stuff/making it look nice then there are various sites such as L322 Vogue 03
If you are after more technical parts then there are a number of sites which act as 'agents' for breakers, where you fill in an online form saying what you are after and they send it to a network of breakers to ask if anyone has that part, they then email you back (usually within 24 hours) giving a contact number for said breaker and a price for the part you are after. An example would be Car Parts: Car Breakers, Used Car Parts and Engines, 4x4, Gearboxes, Ford and Volvo Auto Parts, although a quick google will find you loads of similar sites.
Ebay can be ok, depends what you want, but tends to ait towards 'upgrade' rather than techical parts on the whole.