[GAW]

Finally got a Blazer ( Model PB210-CR ) and after 5 mos it has the same striker problem you describe although it does work occasionaly so the copper piece may be just out of position. No luck with many others - work for a few mos and lose either butane flow or spark.
Decided to try, for at home use, a table top design but on a tip from Walt at Stogie Review in one of his video reviews purchased a type used by chefs to finish carmelizing Creme Brule. Bed Bath and Beyond -19.95 - works great so far and for the money I'll just replace it. Holds a ton of Butane and the flame controls work well. For a portable option matches or a soft flame flint striker type for me for now.