I got mine at the Cotton Shop in Murray ,Utah. They do have a web site, you can see if they still have them. You may also check Joanns or call your local sewing and quilt shops.

I bought my small vacuum from the Viking dealer--it is not a Viking product--the hose hose/parts do not fit into my vacuum cleaner hoses--maybe somebody has been able to fix theirs to work. I am disappointed in that feature.

***
*** I have one - found at Tuesday Morning sometime last year.
*** Regularly $4.99 - their price $1.99.
***
*** Called Designed for Her "creative mini-vac" by Walnut Hollow Farms, Inc. (walnuthollow.com).
*** Used 2 AA batteries.
**i
*** I had forgotten that I had it until you asked.
*** So do not know how well it works.
***

I have this. After a year of barely any use, it died. I literally used it less than 5 times.

vacuum for sewing machines and computer keyboards
 

Try bits and pieces. They sell a small one that I use on the computer keys.

i agree $10 harbor freight.

I bought my mini attachments for regular vacuum cleaner at the Viking Booth in a Joann's store. Canned air blows dust inside deeper and is a definite no-no.

Using any type of vacuum on your computer should be a no no because it builds up static electricity which just attracts more dust. Fellow where I take mine said the worst thing we can do to our computers is clean house and vacuum. Said his house was a mess but his computer was spotless.

I find Aloe Vera tissues are best to take dust off my computer but never on the screen. For this I use my glasses cleaner and a glasses cloth.
I use large pipe cleaners to clean inside my machines and I've been told by my mechanic that they are the cleanest he's ever seen.

I got mine through Nancy's Notions.

I have the kit that attaches to my vacuum hose and I really like it. Easy to use and easy to store. My son bought it for me for Christmas, on Amazon, I think.