I´ve got this little doggie lying around:

It´s the second dog from the Pegasus 1/48 "Farm Animals" box set. It´s about this size, compared to EM4 Figures:

A bit smaller, since the head is in a lower stance.
If you´re interested, drop me a PM and we´ll work something out!
EDIT:
On the interceptor, HLBSCo (under their "Paper Street Soap Company" sublabel) do a model in 1/48th scale, which would IMHO still work with 28mm figures. However, I´m unsure what to think of the catalogue entry - I saw it assembled in an issue of Wargames Illustrated, and it looked okay, but if window glass (acetate), rear seats and parcel shelf are missing, I think 14 GBP is a bit steep and you would be better off looking for a toy car. Anyway, here´s the link:
http://www.hlbs.co.uk/type.php?id=46