What companies make methadone diskets?

Below is from the manfacturers,and is as shown a DEA advisory . I hope this helps.

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Methadone Hydrochloride Tablets USP 40 mg (Dispersible)
--- DEA Advisory---
As of January 1, 2008, manufacturers of methadone hydrochloride
tablets 40 mg (dispersible) have voluntarily agreed to restrict
distribution of this formulation to only those facilities authorized for
detoxification and maintenance treatment of opioid addiction, and
hospitals. Manufacturers will instruct their wholesale distributors to
discontinue supplying this formulation to any facility not meeting the
above criteria.
Methadone is a long-lasting opioid medication used in the treatment
of pain and narcotic addiction. The 5mg and 10 mg formulations
indicated for the treatment of pain will continue to be available to all
authorized registrants, including retail pharmacies. The 40 mg
methadone formulation is indicated for the detoxification and
maintenance treatment of opioid addiction. The 40 mg strength is
not FDA approved for use in the management of pain. Thus, the
distribution and availability of the 40 mg formulation will be limited to
registrants in only those settings using the 40 mg formulation for the
appropriate indication.
The DEA and pharmaceutical industry agree that the reported
increase in methadone-related adverse events merits action and
further agree to a united effort to assure that methadone is properly
distributed, consistent with its approved uses. Industry and the
federal entities involved commit to monitor the progress of this
initiative.