i find it odd that you would need a new camshaft without anyone pulling the motor apart to see what condition its in...? has anyone checked plugs, leads, cap, points, timing, fuel filter etc etc for you?
where are you located?
its the same engine as an eb civic too which are cheap to get hold of, very very easy to repair diy if you get the manual from a library or similar. i once taught a gf to do a cambelt on one of these
i also know that the 1.6 sohc from the late 70's accord will bolt in to most early civics, probably easier than going efi with a city engine.