Actually, go get an aftermarket distributor rotor and ask to see if the package comes with extra bolt (screw) within.
Can't remember the size of the screw though (sorry!)
To take it off is to carefully position the distributor shaft so that the screw head is facing towards you. get a drill with a smaller drillbit and then cut a small hole in the center of the screw head (be careful not to let the drill bit "walk" way causing further damage) using very sharp, new high speed steel bit. Then, use a screw extractor (aka "EZ-out") and then unscrew it and voila!
While I somewhat agree with you RE: Honda tends to use softer screws on most engine related stuff such as air filter housing cover hold-down screws, distributor rotor holddown screw, etc. IMHO the trick in dealing with these type of screw problem is as simple/elegant that it sounds downright silly:
Always consder using a new (not worn), good quality screwdriver approx. #2 in size. Japanese cars built in Asian countries adhere to standard ISO grade screws and screwdriver bit size, which is a little bit different than that of those used in the states. Most of the time, when I hear people bittching about Honda screws stripped, mostly has to do with either (a)worn screwdriver tip and/or (b) a #2 screwdriver that does not fit into the screw properly.
Currently, I have three #2 equivalent screwdrivers destined for use in servicing Honda cars only: a CT 18" long shaft #2 (available in black solid plastic handle from Canadian Tyre); a German made #2 equivalent philips; a Rubycon #2 equivalent that a friend of mine sent to me straight from Japan some moons ago. All 3 of them works like a charm on all Honda relaed soft metal philips screw heads, so long as the philips thread cut isn't stripped or worn.
Lastly, make sure your bit fits the philips cross cut slot properly before you give it a crank-in-da-nut twist and it should break free easily. a small dab of light sewing machine oil would help in keeping the screws from partially seizing from now on.
