You can use wildcard * in Google searches:

http://www.google.com/search?q=%22*+is+loath+to+*%22&btnG=Google+Search
- 123,000 hits

http://www.google.com/search?hl=en&safe=off&q=%22*+am+loath+to+*%22&btnG=Search
- 84,300 hits

http://www.google.com/search?hl=en&safe=off&q=%22*+are+loath+to+*%22&btnG=Search
- 308,000 hits

or more generally just "loath to":
http://www.google.com/search?hl=en&safe=off&q=%22loath+to%22&btnG=Search
- 1,180,000 hits

But I thought the more common error was "loathe to" (a truly grammatical error) instead of "loth/loath to", which are surely just alternative spellings:
http://www.google.com/search?hl=en&safe=off&q=%22loathe+to%22&btnG=Search
- 810,000 hits