Fuse upgrades? -- 6.3 amp 250v 5X20mm fast blow fuses


I occasional blow a one of these 4 fuses in my McCormack DNA .05 and use cheap fuse replacements costing maybe $.50 a piece.  Can anyone recommend upgrades fuses that might enhance the performance of the amp, but not costing in the SR price range.  Say $1-$5 a piece?   Thanks for any insights.    
whitestix
Post removed 
@clearthink wrote:
You have the active fantasy life of a small child... from your mountaintop of ignorance, confusion and disorientation.

@clearthink, Would you care to explain your assessment?  
This is going reasonably well, you know, considering it’s a fuse thread.

If you think UL losing is a big audiophile issue for fuses just ask the 70 or 80 thousand audiophiles who opted for non UL listed aftermarket fuses. And if you insist on something fast acting try some fast actin Tinactin. We want tuna that tastes good, not tuna with good taste. 🐬
Post removed 
Why on Earth would you put fuses anywhere except on the primary of the transformer? The only reason I can imagine is to idiot-proof things because you're customers require idiot-proofing.