mqbernardo wrote: ah.... i forgot that. too much hassle than... someday, if all goes well, you´ll go international!
good luck with blanket! miguel.
Here is a supply option that a lot of us in Australia have used to address this same issue.
At MEI (USA based manufacturer of silicone heaters) you can order what ever you need in a heat blanket to include 240v or 110v, length, width, lead tab exit point, lead length, even an imbedded thermo couple if you want one and your choice of either J type of K type or what ever your PID is setup to read.... pretty much what ever you want, you just use the online order form and tick off what you need. They ship international at reasonable rates and the product is as good as any on the market because they supply the military and industry and therefore need to keep up specs 'and' they too are very reasonably priced.
Some members of the ANZLF forum have complained about the occasional lack of response to email enquires made to MEI. I think folks should try to understand that as a 'manufacturer', MEI are simply not geared up to address retail enquiries. Their normal course of business would see them dealing with engineers and procurement specialist who know exactly what they want. For MEI to take the time to respond to each enquiry coach people along through 'once off' sales advising in product selection, would be providing a service that a retail customer would normally pay a retailer and this would of course add to cost of their product.
Bottom line is you need read and get educated about exactly what you want and then use the online order form provided. Dealing with MEI in this way I have had no issues whatsoever and I do not know of anyone who has. As an indicator I went with a 240v, 5watt per inch, 6 x 36, with exit tab at one end, 1 metre of high temp conductors and an embedded "J" Type thermocouple so I could hook up to a PID with a digital timer in the loop....works a treat. 
http://www.michaelsenterprises.com/DrawOnePage.aspx?PageID=14
Bottom line is you need take the time to read the design guide on their web site and get educated about exactly what you want and then use the online order form provided. It is simple enough and in dealing with MEI this way I have had no issues whatsoever and I do not know of anyone who has.
Attachment: blanky_control.jpg
Cheers
Kim
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I realize that I don't actually have enough information to be certain I'm being helpful. 
