when i owned my EG civics, warm starting issue was mostly down to main relay failure (usually dry joints which simply need soldering). the relay itself is just a single bolt to the right of the driver footwell. parking up stopping at shops for instance, i had trouble re-starting but once cold, fine...
If you do end up needing a distributor or distributor parts, I used to use a company called Probe Distributors. Quick search online and this looks like the closest match. 90% sure this would be them, pretty sure they were Essex based.
Probe Distributors
Address:
4 Bridge Cottage Upminster RM14 3QP United Kingdom
Tel:
01708223225