Littlefuse does not like to sell these in small quantities. I buy them 1000 at a time and pass on the savings to you at $3 each or 10 for $20 plus a small shipping charge. If you send a stamped addressed envelope I will wave shipping charges. You will also get them faster.
Just put your check and note for what you want, what amp you have and I will drop them in the mail.
send to:
Ram Labs
1758 Calle Boca Del Canon
Santa Barbara, CA 93101
The fuse numbers are constantly changing. Every time I order them I have to go through a long process to get some and then I have to test them to see if they are suitable. Last time they had discontinued the fuse I was using for 10 years and I had to research another one.