Maybe a VERY conservative injection of Botox into the anal sphincter would relax it just enough to allow you resume digital stim. Aside from that, and assuming you can wean yourself off the opiates (or any other constipating meds), using the Peristeen system can help you resume your bowel program. I can certainly appreciate the urgency of agony you're going through, and a colostomy may ultimately prove the best remedy, but if there's a rational alternative approach I would certainly encourage you to explore that first. Feel better soon, man!