ovamed or autoimmune therapies. google them. There is a yahoo group associated with AIT that I would join before making any decisions, there is a ton of information available there and real people who are using the treatment... Ovamed is a pig whipworm which is safer but requires a lot of doses and it's quite expensive to maintain. AIT is a human whipworm which I don't think requires frequent reinfection but it requires a human host which means the host must be disease free... You need to be careful whatever you chose but those are the 2 primary places I've seen people go to for worms.
Or a clinical trial?
clinicaltrials.gov/ct2/show/NCT01433471Please let me know if you go this route and your results. I would definitely try this if nothing was working for me..