you could try this. I did it way back, before the interweb existed, advertising in white dwarf and imagine magazine.....
I wrote campaign primers, and ongoing support, for other groups. Advice on how to run it and such., working on feedbak they sent on how a 'bit' went
Basically they sent in details of 'the party / characters and the sort of adventures they liked to do, then i wrote campaign bits / modules specifically tied to their abilities / likes etc.
The world has moved on a bit so dont know if it would still work. Used paper post , writing letters and either writing the material by hand or occassionally using a type writer!!!!
I called is scenarios unlimited iirc.
had about 5 respondents in total over a 18 month to 2 years till i went off to university. Worked quite well.
In this electronic age this may work better, or worse!!
Having time on my hands once more maybe i could ressurect this, though im sure thats thread-napping!!
Good luck to the OP anyways.