rgie, here's what some different styles look like. If you had the right tools, you could probably make one pretty cheap out of some scrap steel.
Brian
http://www.jegs.com/webapp/wcs/stores/servlet/KeywordSearchCmd?storeId=10001&catalogId=10002&langId=-1&Ntk=all&Jnar=0&itemPerPage=60&Ne=1%2B2%2B3%2B13%2B1147708&searchTerm=deive+shaft+loop
