I had a few drawings and ideas as well and after searching hi and low for a way to get my designs made into stamps I found the following sites but never took the plunge due to the mere cost factor and time involved... I am sure there is an easier way to make designs into stamps but.... perhaps you can find some use out of these sites-
Villiage impressions
The stamp critter machine
how to make rubber stamps
See my blog for my designs/samples Jan 7th "who needs stamps" post
my design
Good luck with your designs and if you get anywhere- let me know
Gina