That is a great idea, my friend's been sending me photos of oramorph from his hospital bed, lucky sod, not lucky to be in hospital, but still there are benefits.
But I'm not so well stocked so I buy pods, easy to get in summer, grind to a powder then eat or wash in boiling water to get a lovely bitter dark tea, the darker the better, you can nod with this stuff but it's obviously just as addictive as other opiates, so I vary my bupe up and down, I have that at home.
These pods are 10-15% opium, of which 10-15% is morphine, so you might get a gram of morphine out of 40g-50g pods, nice.
A warning, I've a quite high tolerance, another friend said she DIED after having only 8g of powder. However, she looked very alive to me and no one had resuscitated her...

Morphine is very readily dissolved in water, heat until 85'C won't degrade morphine and by the time the boiling water is poured into a cold flask over cold powder it will be around 85'C, so give it a shake and strain. I wash it three times before it's binned, a handful a day does me now, I previously used 50g-70g a day, My small dose of bupe sits under it, it's not a blocking dose and pregabalin enhances it as well as preventing wds as I only take it once a day and I get wds by next morning unless I've pregabalin.
Life is GOOOOOOD!
I've found buprenorphine easy to taper while I've heard methadone is an awful taper, let us know how you get on this time.