I was searching for some information on assertiveness training for another NMP member and came across this site. They have a few guides/workbooks available for a number of different problems, including Health Anxiety.
Here is the link specifically for Health Anxiety
http://www.cci.health.wa.gov.au/reso...cfm?Info_ID=53
Here is the link for a list of other workbooks they have available - improving assertiveness, coping with depression, body acceptance, overcoming low self-esteem, coping with panic attacks, overcoming disordered eating, coping with social anxiety, etc.
http://www.cci.health.wa.gov.au/resources/consumers.cfm