There is an eBay seller based in Peru (!) but the prices are prohibitively expensive, especially when you add p&p.
Some original scans can be found here on Graham Barber's excellent Restore-A-Gram site (RIP Graham) but there are known limitations to using ink-jet/laser printers : -
http://www.restore-a-gram.co.uk/decals/4591836971
Forum member David G4EBT has done some excellent work in this area but I'll let him explain the complications with water-slide decals.
Don't know if there is any potential for a bulk buy at discount prices from, for example, Radio Daze in the USA?