As written by the FDA regarding the walkaide I also found this information. In my opinion, this may add to why the product isn't found internationally. I put an asterisk (*) in front of information of great importance/need to know for readers to have an informed decision by high credibility/FDA. Attached you will find the link to find/read the document in its entirety.
"The Agency acknowledged your commitments to improve your firm's compliance with the quality system regulation. (*) However, your firm's response does not completely resolve several inspectional observations for the reasons explained in this warning letter. (*) Your firm has not implemented a formal quality plan to improve the quality of your devices and verified its effectiveness. (*)The Agency expects your firm to work closely with the contract manufacturer in order to correct quality issues of your devices, and will conduct follow-up inspections to assure that your firm's corrections are adequate.
(*) These violations include, but are not limited to, the following:
Quality System Violations
(*) 1. Failure to sufficiently evaluate and select potential contractors, suppliers, and consultants on the basis of their ability to meet specified requirements, including quality requirements, as required by 21 C.F.R. § 820.50(a). FDA 483 Item 11.
Specifically, your firm has not adequately evaluated the contract manufacturer for its ability to meet your quality requirements despite the fact that your firm experienced quality issues which resulted in many complaints and two product removals (recalls) initiated between December 2006 and February 2007, and August 6, 2008.
(*) Your response is incomplete. (*) Your response indicated that your firm has been evaluating the contract manufacturer in the past two years but that your firm's evaluation has not been formalized. Your firm plans to put in place a formal quality plan for the contract manufacturer with specific requirements to be met in the next 30 days. The Agency expects your firm to verify the effectiveness of your quality plan in order to effectively correct the past quality issues and prevent new quality issues from occurring in the future..." (cont.)
(*) "2. Failure to establish and maintain adequate procedures for identifying the action(s) needed to correct and prevent recurrence of nonconforming product and other quality problems, as required by 21 C.F.R. § 820.100(a)(3); and (***) failure to verify or validate the corrective and preventive action and document its results to ensure that- such action is effective, as required by 21 C.F.R § 820.100(a)(4) and (. FDA 483 Item 7. Specifically,...” (cont.)
This public viewable document for those that go to the FDA site or follow this link to bring you there directly is:
http://www.fda.gov/ICECI/EnforcementAction.../ucm1048075.htm
If this page was moved view this site info and note the date of it:
http://www.fda.gov/ICECI/EnforcementAction.../ucm1048075.htm
This should allow you to know where to find information to make a better informed decision per FDA's findings.