Hi Mark,
I am in the UK and use a product, which I have just checked and it is, in fact, made in Canada.
A company by the name VisibleDust.
I have used their products, fluids / swabs for many years on Sony's A900 & more recently A99 II and have had no issues.
I prefer the Smear Away fluid to Sensor Clean but both do the job.
Obviously it is up to the individual to make a judgement on cleaning sensors and what method to use so this is not a recommendation, as such, just my personal experience