Micrometer or caliper? I think this is what you mean... http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=42291&item=4346591819&rd=1
Try Harbor Freight Tools--they have a web site that I used for mail order until they opened a retail store in my area. They don't have what I would call professional quality tools (for the full time carpenter or plumber) but their tools are a good value in my opinion.