I'd suggest to you that you check the lowdosenaltrexone.org website for a list of doctors in your geographical area that prescribe. When I 1st contemplated it, my plan was to ask my GI to prescribe it (after reading the material I gave her), failing that ask my GP to do the same (again, after reading Dr Jill Smith's report), and failing that, consulting via the telephone with a US doctor who is willing to do this (I got his info from the above site), then having the drug shipped from the US to Canada thru Customs (I wasn't even sure if this last resort was possible/legal, but I was willing to find out). Fortunately, my GI agreed, and that action literally saved my life. Guinea pig... well, I prefer the designation worlds largest lab rat, but I'm a happy and healthy lab rat, thanks to a brave, intelligent and dedicated doctor who put her patient first above all else.
The next question you may have to face is.. even if you find a doctor who will prescribe LDN for you, will your current GI continue to see you if you take it? My guess is that is probably a negative. Are you willing to risk losing your GI over this issue? If the answer is yes, then your best bet may be to start shopping for a GI now who will prescribe LDN and stand by you to monitor your progress. Wish I could be of more help.